# Order Calculation with Discount and Service Charges

We have a requirement to sell our products in perfect tens (fractional argument)

For example - We have product A of price 915, we apply a 10% discount and a 5% service charge, and we get a total of 865. To make it in perfect tens we need to remove the last digit 5.

So in square if we add 5 (amount) as a discount, the total goes to 859 and if we add 4 (amount) as a discount total goes to 861.

Please help us to make it 860.

When we’ve added a discount of 4

``````{
"order": {
"id": "s52VttHSYFJRrIiI8huID13SqYNZY",
"location_id": "L4VN08BBCV0Z7",
"line_items": [
{
"uid": "nKIQDKbH4fs3e0WKTSL2QC",
"quantity": "1",
"name": "Fanta",
"base_price_money": {
"amount": 915,
"currency": "JPY"
},
"gross_sales_money": {
"amount": 915,
"currency": "JPY"
},
"total_tax_money": {
"amount": 0,
"currency": "JPY"
},
"total_discount_money": {
"amount": 95,
"currency": "JPY"
},
"total_money": {
"amount": 820,
"currency": "JPY"
},
"variation_total_price_money": {
"amount": 915,
"currency": "JPY"
},
"applied_discounts": [
{
"uid": "peLrCpSPCYrz3yYQ2huFqC",
"discount_uid": "wmK6WsKKXQDGCUkTI8D1PB",
"applied_money": {
"amount": 91,
"currency": "JPY"
}
},
{
"uid": "soajMUY5HFavHo9Bq5FjI",
"discount_uid": "QLbE0CSkFy7bIQEQVP5rAC",
"applied_money": {
"amount": 4,
"currency": "JPY"
}
}
],
"item_type": "ITEM",
"total_service_charge_money": {
"amount": 0,
"currency": "JPY"
}
}
],
"discounts": [
{
"uid": "wmK6WsKKXQDGCUkTI8D1PB",
"name": "Discount percent (ORDER)",
"percentage": "10",
"applied_money": {
"amount": 91,
"currency": "JPY"
},
"type": "FIXED_PERCENTAGE",
"scope": "ORDER"
},
{
"uid": "QLbE0CSkFy7bIQEQVP5rAC",
"name": " Fractional Discount amount (ORDER)",
"amount_money": {
"amount": 4,
"currency": "JPY"
},
"applied_money": {
"amount": 4,
"currency": "JPY"
},
"type": "FIXED_AMOUNT",
"scope": "ORDER"
}
],
"created_at": "2024-05-24T06:29:04.184Z",
"updated_at": "2024-05-24T06:29:04.184Z",
"state": "OPEN",
"version": 1,
"total_tax_money": {
"amount": 0,
"currency": "JPY"
},
"total_discount_money": {
"amount": 95,
"currency": "JPY"
},
"total_tip_money": {
"amount": 0,
"currency": "JPY"
},
"total_money": {
"amount": 861,
"currency": "JPY"
},
"service_charges": [
{
"uid": "qQ8cNcJkl5qdrwArSznPkC",
"name": "Surplus percent (ORDER)",
"percentage": "5",
"applied_money": {
"amount": 41,
"currency": "JPY"
},
"calculation_phase": "TOTAL_PHASE",
"taxable": false,
"total_money": {
"amount": 41,
"currency": "JPY"
},
"total_tax_money": {
"amount": 0,
"currency": "JPY"
},
"type": "CUSTOM",
"treatment_type": "LINE_ITEM_TREATMENT",
"scope": "ORDER"
}
],
"total_service_charge_money": {
"amount": 41,
"currency": "JPY"
},
"net_amounts": {
"total_money": {
"amount": 861,
"currency": "JPY"
},
"tax_money": {
"amount": 0,
"currency": "JPY"
},
"discount_money": {
"amount": 95,
"currency": "JPY"
},
"tip_money": {
"amount": 0,
"currency": "JPY"
},
"service_charge_money": {
"amount": 41,
"currency": "JPY"
}
},
"source": {
"name": "POS regi"
},
"net_amount_due_money": {
"amount": 861,
"currency": "JPY"
}
}
}
``````

When we’ve added a discount of 5

``````{
"order": {
"id": "QTcojUk3imyoY1DQpILfLoqEHJ9YY",
"location_id": "L4VN08BBCV0Z7",
"line_items": [
{
"uid": "o18u77vB89D3wyRqd07smB",
"quantity": "1",
"name": "Fanta",
"base_price_money": {
"amount": 915,
"currency": "JPY"
},
"gross_sales_money": {
"amount": 915,
"currency": "JPY"
},
"total_tax_money": {
"amount": 0,
"currency": "JPY"
},
"total_discount_money": {
"amount": 96,
"currency": "JPY"
},
"total_money": {
"amount": 819,
"currency": "JPY"
},
"variation_total_price_money": {
"amount": 915,
"currency": "JPY"
},
"applied_discounts": [
{
"uid": "wjWI1spkh1CQkPCs5JCrT",
"discount_uid": "TCGKysPV2hmRTbbQHhzZXD",
"applied_money": {
"amount": 91,
"currency": "JPY"
}
},
{
"uid": "WWRlRbgg3yprgc84Ik6oG",
"discount_uid": "4zmeMnKxg1PXsVsNc0iW0B",
"applied_money": {
"amount": 5,
"currency": "JPY"
}
}
],
"item_type": "ITEM",
"total_service_charge_money": {
"amount": 0,
"currency": "JPY"
}
}
],
"discounts": [
{
"uid": "TCGKysPV2hmRTbbQHhzZXD",
"name": "Discount percent (ORDER)",
"percentage": "10",
"applied_money": {
"amount": 91,
"currency": "JPY"
},
"type": "FIXED_PERCENTAGE",
"scope": "ORDER"
},
{
"uid": "4zmeMnKxg1PXsVsNc0iW0B",
"name": " Fractional Discount amount (ORDER)",
"amount_money": {
"amount": 5,
"currency": "JPY"
},
"applied_money": {
"amount": 5,
"currency": "JPY"
},
"type": "FIXED_AMOUNT",
"scope": "ORDER"
}
],
"created_at": "2024-05-24T06:29:58.710Z",
"updated_at": "2024-05-24T06:29:58.710Z",
"state": "OPEN",
"version": 1,
"total_tax_money": {
"amount": 0,
"currency": "JPY"
},
"total_discount_money": {
"amount": 96,
"currency": "JPY"
},
"total_tip_money": {
"amount": 0,
"currency": "JPY"
},
"total_money": {
"amount": 859,
"currency": "JPY"
},
"service_charges": [
{
"uid": "Brh0KyfCUKocO9XibCj85B",
"name": "Surplus percent (ORDER)",
"percentage": "5",
"applied_money": {
"amount": 40,
"currency": "JPY"
},
"calculation_phase": "TOTAL_PHASE",
"taxable": false,
"total_money": {
"amount": 40,
"currency": "JPY"
},
"total_tax_money": {
"amount": 0,
"currency": "JPY"
},
"type": "CUSTOM",
"treatment_type": "LINE_ITEM_TREATMENT",
"scope": "ORDER"
}
],
"total_service_charge_money": {
"amount": 40,
"currency": "JPY"
},
"net_amounts": {
"total_money": {
"amount": 859,
"currency": "JPY"
},
"tax_money": {
"amount": 0,
"currency": "JPY"
},
"discount_money": {
"amount": 96,
"currency": "JPY"
},
"tip_money": {
"amount": 0,
"currency": "JPY"
},
"service_charge_money": {
"amount": 40,
"currency": "JPY"
}
},
"source": {
"name": "POS regi"
},
"net_amount_due_money": {
"amount": 859,
"currency": "JPY"
}
}
}
``````

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Our orders will let you override the price so you can make it a perfect tens. However if your going to apply any form of a percentage discount or service charge you will alway run into rounding issues given that we use bankers rounding to the half even.