Subtotal/Tax Calculations

[macmedia]

Subtotal subtracts (wrong amount at that) tax from item price?
Not sure if this a bug, or by design. When adding an item to the cart with a price of $100 and a tax rate of %10, the subtotal shows $90.91.

1. Shouldn't the subtotal be the price of the item(s) in the cart? Qty 1 @ $100 is $100+tax
2. Why is the tax coming up as $9.09 ($100 * 10% = $110)

Subtotal = 100.00
Tax      =  10.00
=================
Total    = 110.00

Response Object

shoppingCart:Object
count:1
discounts:Array[0]
items:Array[1]
sub_total:90.9090909090909
sub_total_formatted:"$90.91"
tax_total:9.090909090909092
tax_total_formatted:"$9.09"
total:100
total_formatted:"$100.00"
shoppingCartCount:1
shoppingCartEmpty:false

To Reproduce
Steps to reproduce the behavior:

1. Add item to cart

let data = {
   'shoppable_type': 'App\\Model',
   'shoppable_id': product,
   'quantity': 1,
   'price': 100.00
}
this.$http.post('/api/shopr/cart/items',data)

Expected behavior

shoppingCart:Object
count:1
discounts:Array[0]
items:Array[1]
sub_total:100.00
sub_total_formatted:"$100.00"
tax_total:10.000
tax_total_formatted:"$10.00"
total:110
total_formatted:"$110.00"
shoppingCartCount:1
shoppingCartEmpty:false

Desktop (please complete the following information):

• OS: MacOS 10.14.6
• Browser: Chrome
• Version: Version 75.0.3770.142

Additional context

Config file: shopr.php

/*
 * The tax percentage.
 */

'tax' => 10,

[mattias-persson]

Hi! Thanks for your question. The tax is calculated on the gross price, not the net price. So basically you'd set $110 as the price on your shoppable (including tax) and the tax will be correctly calculated. For more details, check this out: https://www.omnicalculator.com/finance/sales_tax?c=USD&v=tax:10!perc!l,gross:100.

I hope that helps! I'm closing this as the calculation is by design and not a bug.