Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.
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Question: mrs. santiago has 58 red roses . mrs. garrett has 24 what 's the difference of the number of mrs. santiago 's red roses and mrs. garrett 's red roses ?

Answer: 34

Question: the treehouse is almost done ; all they need is to paint it . his father estimated that they will use 20 ounces of white paint 15 ounces of green paint and 34 ounces of brown paint . how many ounces of paint would they buy in total ?

Answer: 69

Question: mrs. griffin went to the grocery store with $ 70 . she had $ 16 left after shopping . how much did mrs. griffin spend ?

Answer:
54