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

[EX Q]: Melanie picked 7 plums and 4 oranges from the orchard . She gave 3 plums to Sam . How many plums does she have now ?
[EX A]: 4

[EX Q]: A store had 50 oranges in a bin . If they threw away 40 of the old ones and put 24 new ones in the bin how many would be in the bin ?
[EX A]: 34

[EX Q]: Justin needs 61 paper plates for a birthday party . He already has 26 blue plates and 7 red plates . How many more plates should Justin buy ?
[EX A]:
28