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]: Kaleen filled a bucket with 0.75 gallon of water . A few minutes later , she realized only 0.5 gallon of water remained . How much water had leaked out of the bucket ?
[EX A]: 0.25

[EX Q]: Joan found 70 seashells on the beach . she gave Sam some of her seashells . She has 27 seashell . How many seashells did she give to Sam ?
[EX A]: 43

[EX Q]: Dan spent $ 11.76 on a snake toy , and a cage cost him $ 14.54 . Dan also found a dollar bill on the ground . What was the total cost of Dan 's purchases ?
[EX A]:
26.3