While cultivating a small farm, a farmer spent $50 on corn seeds, $35 on fertilizers and pesticides, and $15 on labor. After a successful harvest, he was able to gather 10 bags of corn. How much should he sell each bag, if he wants to make a profit of 10%? Give the rationale and then the answer.
Let's think step by step. His total expenditure so far is $50 + $35 + $15 = $100. To make a profit of 10%, he has to make a total of $100 + ($100 * (10 / 100) = $110 from sales. To make $110 from the sales of 10 bags, each bag should cost $110 / 10 = $11.. The answer is: 11.

Jack has a stack of books that is 12 inches thick. He knows from experience that 80 pages is one inch thick. If he has 6 books, how many pages is each one on average? Give the rationale and then the answer.
Let's think step by step. There are 960 pages because 80 x 12 = 960. Each book is 160 pages because 960 / 6 = 160.. The answer is: 160.

Augustus can make 3 milkshakes per hour while Luna can make 7 milkshakes per hour. If Augustus and Luna have been making milkshakes for 8 hours now, how many milkshakes have they made? Give the rationale and then the answer.
Let's think step by step. Augustus and Luna can make a total of 3 + 7 = 10 milkshakes per hour. Therefore, they made a total of 10 x 8 = 80 milkshakes in 8 hours.. The answer is: 80.