Question

Amanda opened a lemonade stand on her
street. It costs her $10.75 to buy the supplies
each day, and she sells lemonade for $1.50 a
cup.

If she wants to make at least $50.00 in profits
(sales - expenses) each day, what is the
minimum number of cups of lemonade
Amanda needs to sell? Input your answer as
a whole number.

Answer 1

Let n = number of cups. Profit = 1.50n − 10.75 ≥ 50.

1.50n ≥ 60.75 → n ≥ 60.75 / 1.5 = 40.5.

So she must sell at least 41 cups.