Answer:
Step-by-step explanation:
It's arithmetic.
Just keep on adding 8 to each term.
-3 + 8 = 5
5 + 8 = 13
13 + 8 = 21
15.99 * .8 = 12.79
15.99 + 12.79 = 28.78
the answer is $28.78 :)
120
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