Question: Janet has 9 cards more than Brenda. Mara has twice as many cards as Janet. How many cards do they have in all if Mara has 40 cards less than 150?
Answer: Mara has 150 - 40 = 110 cards. Janet has 110 / 2 = 55 cards since Mara has twice as many as Janet. Brenda has 55 - 9 = 46 cards since Janet has 9 cards more than Brenda. Therefore, they all have 110 + 55 + 46 = 211 cards. The answer is 211.

Question: Happy Island has 60 turtles. This means there are 10 more than 2 times as many turtles on Happy Island as on Lonely Island. How many turtles are there on Lonely Island?
Answer: After subtracting 10 from the number of turtles on Happy Island, we get 60 - 10 = 50 turtles. Dividing this number by two, we find that the number of turtles on Lonely Island is 50 / 2 = 25 turtles. The answer is 25.

Question: In the first round of bowling, Patrick knocked down a total of 70 pins and Richard knocked down 15 more pins than Patrick. In the second round, Patrick knocked down twice as many pins as Richard in the first round and Richard knocked down 3 less than Patrick. How many more pins in total did Richard knock down than Patrick?
Answer: In the first round, Richard knocked down 70 + 15 = 85 pins. In the second round, Patrick knocked down 85 x 2 = 170 pins. In the second round, Richard knocked down 170 - 3 = 167 pins. In total, Patrick knocked down 70 + 170 = 240 pins. In total, Richard knocked down 85 + 167 = 252 pins. Richard knocked down 252 - 240 = 12 pins more than Patrick. The answer is 12.

Question: Tim decides to start selling necklaces he makes. He uses 10 charms to make each necklace. Each charm cost $15. He sells the necklace for $200. How much profit does he make if he sells 30?
Answer:

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.
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Each necklace cost 10 * 15 = $150 to make. So he makes a profit of 200 - 150 = $50 each. So his total profit is 50 * 30 = $1500. The answer is 1500.