SOLVED: Vat amount calculate

@mahoozi97

Sep '23

hi everyone , I tried this code for calculate vat amount because not all items have a vat.

private var vatAmount1: Double {

        itemsData.items.reduce(0.0) { partialResult, item in

            if item.vat > 0 {

                let vat = item.price / 100 * item.vat

                return partialResult + vat

            }

            return partialResult

        }

    }

item.price = 2.200 included vat item.vat = 10

The result from that code is 0.220 , but the correct result is 0.200 , How to solve that ?

Thanks in Advance

@ygeras

Sep '23

Hi, It is not really clear what are you trying to achieve at least for me. Do you want to get aggregate amout for all items, or to add VAT to particular item?

if you need to calculate the amount for VAT use this logic.

You have gross amount with VAT included so calculate first NET amount. Then from GROSS amount deduct NET amount and you will get VAT amount.

NET = GROSS / (1 + VAT/100)

VAT amount = GROSS - NET

let netAmount = item.price / (1 + item.vat/100)
let vatAmount = item.price - netAmount

@mahoozi97

Sep '23

Thanks @ygeras

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