Refactor Duplicated Math Code into a Function

A shop needs to calculate total price after tax for several items.
Currently, the calculation is duplicated for each item. Refactor the code so there are no repeated mathematical operations – instead, write a function to do the calculation, and update the code to use your new function.

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function greet(name) {
    return `Hello, ${name}!`;
}

console.log(greet("Erik"));

JavaScript

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