Answer:
I Think the answer is 7.5 dollars
Explanation
2 cereal bars at the supermarket are 1.50. So divide that by 2 to see how much is 1 cereal bar.
1 cereal bar = 0.75 pounds
0.75*5 = 3.75. 3.75 for 5 bars is less than 5 cereal bars for 4.
So you know the cheaper store, now do 0.75*10 to see how much it would cost for 10 bars
0.75*10=7.5
so the answer is 7.5