Assume you want to buy two goods: apple juice (A) and sausage (S), and the price of apple juice is Pa = $5 and the price of sausage is Ps = $10. If your income is $4,000,
a. How many quantities of apple juice will you buy if you spend all your income on apple juice?
b. How many quantities of sausage will you buy if you spend all your income on sausage?