Penny's Inc. had sales of $37,450 including sales tax. If the sales revenue recorded were 35,000 the sales tax must be 7% If the tax payable were $1,800 the sales tax must be 5% If the sales tax was 10%, the Sales revenue would be $34,020 The sales revenue must have been $35.000 and the tax rate 10% If the sales tax was 10%, the taxes payable would be $3.780