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.

The total number of students absent from B. Jones High School on a Monday after a significant snow fall was 218 . The total attendance that day was 1487 . How many students , in total , attend B. Jones High School ?
1705

A pet store had 12 siamese cats and 20 house cats . During a sale they sold 20 cats . How many cats do they have left ?
12

Joan picked 43 apples from the orchard , and gave 27 apples to Melanie . How many apples does Joan have now ?

16