Function calculateTotalWithTax

calculateTotalWithTax(subtotal: number, taxRate: number): number
Calculates the total amount after applying tax.
Parameters
- subtotal: number
  The original amount before tax.
- taxRate: number
  The tax rate as a percentage.
Returns number
The total amount including tax, rounded to 2 decimal places.
Example
```
const total = calculateTotalWithTax(100, 8.25);
console.log(total); // Output: 108.25
```
- Defined in src/currency/utils.ts:55