# Calculate Tax Amount

Easy
4
1
25.2% Acceptance

In this lab, you have to implement a function that calculates the tax amount based on given progressive tax brackets. The given tax brackets have an upper bound and a tax rate at that bracket.

You will be given a 2D integer array `brackets` where `brackets[i] = [upperi, percenti]` represents that the `ith` tax bracket has an upper-bound income of `upperi` and is taxed at a rate of `percenti`.

The tax brackets are sorted by their upper bound, meaning `upperi-1 < upperi` for `0 < i < brackets.length`.

Based on the given brackets and the income, you need to calculate the total tax to be paid.

Example:

``````1// brackets = [[3, 50], [7, 10], [12, 25]]
2// income = 10
3// Output: 2.65
4
5// Explanation:
6// Based on your income, you have:
7// - 3 dollars in the 1st tax bracket (tax rate 50%)
8// - 4 dollars in the 2nd tax bracket (tax rate 10%)
9// - 3 dollars in the 3rd tax bracket (tax rate 25%)
10
11// In total, you pay \$3 * 50% + \$4 * 10% + \$3 * 25% = \$2.65 in taxes.``````

Function Signature:

``````/**
* @param {number[][]} brackets
* @param {number} income
* @return {number}
*/
const calculateTax = (brackets, income) => {
};``````

Constraints:

• `1 <= brackets.length <= 100`
• `1 <= upperi <= 1000`
• `0 <= percenti <= 100`
• `0 <= income <= 1000`
• `upperi` is sorted in ascending order.
• All the values of `upperi` are unique.
• The upper bound of the last tax bracket is greater than or equal to `income`.

## Challenges

1. Implement the `calculateTax` function.
2. Export the `calculateTax` function.
3. Make sure you're default export the function