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.

Q: Mrs. Hilt looked at her car 's odometer before a trip . The odometer showed that she had traveled 212.3 miles . When she stopped for lunch , the odometer read 372 . How many miles had she traveled ?

A: 159.7
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Q: At the hardware store , 0.25 the nails are size 2d and 0.5 the nails are size 4d . What fraction of the nails are either size 2d or 4d ?

A: 0.75
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Q: Melanie bought a Batman game for $ 6.95 , a strategy game for $ 7.9 , and a Superman game for $ 7.73 . Melanie already owns 4 games . How much did Melanie spend on video games ?

A:
22.58
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