You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Dalton wants to buy a jump rope that costs $ 7 , a board game that costs $ 12 , and a playground ball that costs $ 4 . He has saved $ 6 from his allowance , and his uncle gave him $ 13 . How much more money does Dalton need to buy the jump rope , the game , and the ball ?
4

Last Saturday , Spencer walked all over town running errands . First , he walked 0.3 mile from his house to the library and 0.1 mile from the library to the post office . Then he walked 0.4 mile from the post office back home . How many miles did Spencer walk in all ?
0.8

Adam had 33 books . If he sold 11 of them and used the money he earned to buy 23 new books , how many books would Adam have ?

45

