9514 1404 393
Answer:
$0.80
Step-by-step explanation:
The cost of each box is $30. To make a profit of $10, the 50 candy bars must be sold for a price that will generate $30 +10 = $40 in revenue:
$40/(50 bars) = $(4/5)/bar = $0.80 per bar
The school must charge $0.80 for each candy bar to make a profit of $10 per box.