At 1 December 2012, Laurel owed sales tax to the state of $23,778. During the month of December she had the following transactions: -sales of $800,000 exclusive of 17.5 % sales tax -purchase of $590,790 inclusive of 17.5% sales tax.
During December she has paid no tax to the state. How much did Laurel owe to the state for sales tax at the end of December? Can I see the method of calculation please?