To get the printer to work, Jerry needs to add a black-and-white cartridge and three color cartridges. If each color cartridge costs $32 and each black-and-white cartridge costs $27, how much does he pay total? Give the rationale and then the answer.
Let's think step by step. First find the total cost of the color cartridges: $32 / cartridge * 3 cartridges = $96. Then add the cost of the black - and - white cartridge to find the total cost: $96 + $27 = $123.. The answer is: 123.

Rafael works 10 hours on Monday and 8 hours on Tuesday on his delivery job. With 20 hours left to work in the week, how much money does Rafael make if he is paid $20 per hour? Give the rationale and then the answer.
Let's think step by step. The total number of hours that Rafael has worked by Tuesday is 8 + 10 = 18 hours. To complete his assigned work hours, Rafael works 20 hours more, making his total weekly hours to be 18 + 20 = 38 hours. Since he is paid $20 per hour, he makes $20 * 38 = $760 a week.. The answer is: 760.

Alyssa and Abigail need to collect 100 empty cans for their Science project. As of today, Alyssa collected 30 while Abigail collected 43 empty cans. How many more empty cans should they collect? Give the rationale and then the answer.
Let's think step by step. Alyssa and Abigail collected a total of 30 + 43 = 73 empty cans as of today. So, they still need to collect 100 - 73 = 27 more empty cans.. The answer is: 27.