Answer:
Let's start by finding the cost per glass of lemonade.We know that Jennifer spent $10.25 on supplies, but we don't know how many glasses of lemonade she can make with that.Let's assume that she needs to buy lemons, sugar, and cups. If we estimate that the cost of each glass of lemonade is $0.25 (for the lemon and sugar) and $0.05 (for the cup), then the total cost per glass is $0.30.To make a profit, Jennifer needs to sell each glass for more than $0.30. If she sells each glass for $0.45, then her profit per glass is $0.15.To break even (make no profit, but also no loss), she would need to sell 68 glasses of lemonade (10.25 / 0.15 = 68.33, rounded up).Therefore, she would need to sell at least 69 glasses of lemonade at $0.45 per glass to make a profit.