Q: Kelly puts string cheeses in her kids lunches 5 days per week. Her oldest wants 2 every day and her youngest will only eat 1. The packages come with 30 string cheeses per pack. How many packages of string cheese will Kelly need to fill her kids lunches for 4 weeks?
A: 2
Step-by-step reasoning process: Her oldest wants 2 strings cheeses a day for 5 days so 2 * 5 = 10 string cheeses. Her youngest wants 1 string cheese a day for 5 days so 1 * 5 = 5 string cheeses. Together they want 10 + 5 = 15 string cheeses a week. Over 4 weeks, her kids will eat 15 string cheeses so 4 * 15 = 60 string cheeses. The bags have 30 per pack and she needs 60 so 60 / 30 = 2 packs of string cheese.


Q: There are 50 apples and 40 oranges in the cafeteria. If an apple costs $0.80 and an orange costs $0.50, how much does the cafeteria earn for apples and oranges if there are only 10 apples and 6 oranges left?
A: 49
Step-by-step reasoning process: Counting the remaining 10 apples. There were 50 - 10 = 40 apples sold. Counting the remaining 6 oranges. There were 40 - 6 = 34 oranges sold. The amount of sales for the apples is $0.8 x 40 = $32. The amount of sales for the oranges is $0.5 x 34 = $17. The cafeteria's total earnings are $32 + $17 = $49.


Q: Alexa and Emily open up a lemonade stand in the front yard. They spent $10 for lemons, $5 for sugar and $3 for cups. The lemonade is $4 a cup. They sell a total of 21 cups. How much profit did Alexa and Emily make after paying off expenses?
A: 66
Step-by-step reasoning process: Alexa and Emily spend a total of $10 + $5 + $3 = $18. They make a total of $4 x 21 = $84. They make a profit of $84 - $18 = $66.


Q: Lenny bought 20 boxes of pens. Each box contained 5 pens. She gave 40% of the pens to her close friends and one-fourth of what's left to her classmates. How many pens were left for Lenny?
A: 45

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Step-by-step reasoning process: Lenny has 20 x 5 = 100 pens. She gave her close friends 100 x 40% = 40 pens. So, 100 - 40 = 60 pens were left. Half of 60 is 60 / 4 = 15 pens. Thus, Lenny has 60 - 15 = 45 pens left.