The first earth day was observed on april 22, 1970. since then, the week of april 22 has been earth week, a time for showing support for environmental causes. fans cafe is offering a reduced refill rate for soft drinks during earth week for anyone purchasing a fans mug. the mug costs $2.95 filled with 16 ounces of soft drink. the refill price is $0.50. a 16-ounce drink in a disposable cup costs $0.85. what is the approximate break-even point for buying the mug and refills in comparison to buying soft drinks in disposable cups? a. (5, 7.8) c. (4, 6.7) b. (8, 0.5) d. (7, 5.95)