URGENT HELP (MATH) Monica paid sales tax of $20 when she bought a new bike. If the sales tax rate was 5%, how much did the store charge for the bike before tax?

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