A lemonade stand sells cups for $1.50. If supplies cost $8, how many cups must you sell to make $20 profit?
Answer
19 cups
How to solve it
1
Target revenue: $20 + $8 = $28
2
Cups needed: $28 ÷ $1.50 = 18.67
3
Round up: 19 cups
Hints
Add desired profit to costs
Divide by price per cup
Round up since you can't sell partial cups