Question

What is the easiest way to find the answer?

Answer 1

multiply the number of ounces by the price per ounce

Blue jelly beans cost 0.28 per ounce and there are 4 ounces

 4 * 0.28 = 1.12

red jelly beans cost 0.55 per ounce and there is 3 ounces

3 *0.55 = 1.65

now add the totals: 1.12 +1.65 = 2.77

 this is more than the total they want of 2.20

 so it is not reasonable.