1x9+8=g which number is g

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

How is this equation completed? i cannot find any examples in the book.

What will be the end result for the taxpayer who filed his federal income tax return using the 1040ez form shown belowa he'll owe $173b he'll receive a refund of $173c he'll owe $3921d he'll receive a refund of $3921