Consider the Q and A. Q: Sally reads 10 pages of a book on weekdays and 20 pages on weekends. If it takes 2 weeks for Sally to finish her book, how many pages that book has?
A: 180
What is the step-by-step reasoning process?
Step-by-step reasoning process: Two weeks has 5 * 2 = 10 weekdays. Two weeks has 2 * 2 = 4 weekends. On weekdays, she reads 10 * 10 = 100 pages in total. On weekends, she reads 20 * 4 = 80 pages in total. So the book has 100 + 80 = 180 pages.

Consider the Q and A. Q: James has barrels that he uses to store water. They store 3 gallons more than twice as much as a large cask. If he has 4 barrels and a cask stores 20 gallons, how much water can he store?
A: 172
What is the step-by-step reasoning process?
Step-by-step reasoning process: A barrel stores 20 * 2 + 3 = 43 gallons. So he can store 4 * 43 = 172 gallons.

Consider the Q and A. Q: James decides to cut down some trees. In the first 2 days, he cuts down 20 trees each day. For the next 3 days his 2 brothers help him cut down trees. They cut 20% fewer trees per day than James. How many total trees were cut down?
A: 196
What is the step-by-step reasoning process?
Step-by-step reasoning process: He cuts down 2 * 20 = 40 trees by himself. Each of his brothers cuts down 20 * .2 = 4 fewer trees per day. So they each cut down 20 - 4 = 16 trees. So for the next 3 days they cut down 20 + 16 * 2 = 52 trees per day. So they cut down 40 + 52 * 3 = 196 trees.

Consider the Q and A. Q: Roe saved $10 per month from January to July and saved $15 per month from August to November. How much should she save in December so she will have a total savings of $150 in the year?
A: 20
What is the step-by-step reasoning process?
Step-by-step reasoning process:
Since there are 7 months from January to July, then Roe's savings for those months sum up to $10 x 7 = $70. Since there are 4 months from August to November, then her savings for those months sum up to $15 x 4 = $60. Her total savings from January to November is $70 + $60 = $130. Therefore, she needs to save $150 - $130 = $20 in December.