Can someone help me with the following code

Question

I am trying to calculate salaryIncrease from the given percentage as input.. Please help where I went wrong

function main() {
var percent = parseInt(readLine(),10);

console.log(salaryIncrease(percent));
}
var salaries = [3000, 7000, 5000, 15000];
const salaryIncrease = percent => {
//your code goes here
salaries.forEach(percent =>{
let salaryIncrease = salaries * percent;
});
}

Answer 1

salaryIncrease function not return anything?!

Answer 2

could you please write the output you want to get?!

Answer 3

var sum = 0;
salaries.forEach(salary => sum += salary * percent / 100.0);
return sum;