How can i add three input value?

Question

function expenseAndBalance(expense) {
const input = document.getElementById(expense + '-input');
const inputValue = parseInt(input.value);
const inputTotalValue = 
inputValue(food)+inputValue(rent)+inputValue(cloths) ;
}
expenseAndBalance('food'); // 50 
expenseAndBalance('rent'); // 100
expenseAndBalance('cloths'); //100

I want to sum three input value in function , function already called from below. How can i add three input value?

Output will be 250