Elizabeth works a part time schedule to help pay for college. She has worked for the last 14 days without a day off for a total
of 48 hours. Depending on her schedule she either worked 3 or 4 hours a day. During the 14 day period how many days did Elizabeth work for 4 hours a day?
It seems to me, that if you were to add the price of all three items together, then multiply by 7.5%, you'd have the answer. Remember that 7.5% = .075 ... in other words, that is the number you would multiply the sum of the items by. Does that help?