You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.

Last week Fred had 23 dollars and Jason had 46 dollars. Fred washedcars over the weekend and now has 86 dollars. How much money didFred make washing cars?
63.0

Alyssa bought some toys. She bought a football for $5.71, and spent $6.59 on marbles. In total, how much did Alyssa spend on toys?
12.3

Melanie picked 4 plums, Dan picked 9 plums, and Sally picked 3plums from the plum tree. How many plums were picked in total?

16.0