A drink costs 3 dollars. A pizza costs 6 dollars. Given the number of each, compute total cost and assign to totalCost. Ex: 2 dr
inks and 3 pizzas yields totalCost of 24. let drinkQuantity = 2; // Code tested with values: 2 and 4
let pizzaQuantity = 3; // Code tested with values: 3 and 7
