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]: 30 dogs are barking . 10 more dogs start to bark . How many dogs are barking ?
[EX A]: 40

[EX Q]: A pet store had 36 siamese cats and 18 house cats . During a sale they sold 26 cats . How many cats do they have left ?
[EX A]: 28

[EX Q]: Megan was selling her necklaces at a garage sale . She sold 7 bead necklaces and 3 gem stone necklaces . If each necklace cost 9 dollars , how much money did she earn ?
[EX A]:
90