Hint:
Options available to Joe:
1) 1 Bag of 30 ($13) + 2 Bags of 10 (4.52 = $9) + 4 mandarins
2) 5 bags of 10 Mandarin (4.5 * 5 = $22.5) + 5 mandarins for $0.50 each (0.55 = $2.5)
3) 50 mandarins for $0.50 each (0.50 * 50 = $25)
Now, decide the option that will allow Joe to buy maximum mandarins and calculate the answer
