Question: There are 8 red pens in Maria's desk drawer. There are 10 more black pens than red pens. There are also 7 more blue pens than red pens. How many pens are there in all?
Answer: Step-by-step reasoning process: Maria has 8 + 10 = 18 black pens. Maria has 8 + 7 = 15 blue pens. Maria has 8 + 18 + 15 = 41 pens in total.
So the answer is 41.

Question: During a staff meeting, 50 doughnuts were served. If each of the 19 staff ate 2 doughnuts, how many doughnuts are left?
Answer: Step-by-step reasoning process: The staff had eaten a total of 19 x 2 = 38 doughnuts. So, 50 - 38 = 12 doughnuts are left.
So the answer is 12.

Question: For Halloween, Taquon, Mack and Jafari put their candy together and they had 418 pieces of candy. If Taquon and Mack each had 171 pieces of candy, how many pieces of candy did Jafari start with?
Answer: Step-by-step reasoning process: Taquon + Mack = 2 * 171 = 342 pieces. 418 - 342 = 76 pieces. Jafari started with 76 pieces of candy.
So the answer is 76.

Question: Irene earns $500 if she works for 40 hours a week and gets an extra $20 for every hour of overtime. If she worked 50 hours last week, calculate her total income.
Answer:
Step-by-step reasoning process: If Irene worked 50 hours last week, the total number of hours counting as overtime is 50 - 40 = 10 hours. Since she's given $20 for every hour of overtime, she earned 10 * $20 = $200 in overtime. Her total income, including the overtime, is $500 + $200 = $700.
So the answer is 700.