Mrs. Thomson received an incentive worth $240. She spent 1/3 of the money on food and 1/5 of it on clothes. Then, she put in her savings account 3/4 of the remaining money. How much money did Mrs. Thomson save? Let's think first. Chain of thought:
Mrs. Thomson spent $240 x 1 / 3 = $80 on food. She spent $240 x 1 / 5 = $48 on clothes. So she spent a total of $80 + $48 = $128 on food and clothes. Hence, she had $240 - $128 = $112 left after buying food and clothes. Then, Mrs. Thomson saved $112 x 3 / 4 = $84.
Therefore, the answer is 84.