10. In the sales tax cell, enter a formula that will display the sales tax so if the customer's province is ON, then calculate 13% of the subtotal. If the province is something other than ON, the sales tax will be 5% of the subtotal. 11. In the Shipping cell, use the IF and vlookup functions to determine the shipping cost. If the subtotal is 0, the shipping cost should be 0. 12. In the Total Due cell, enter the correct formula. 13. Enter the following data into the worksheet and check that it works: Item 1: Gourmet (2) 3g Flavour: Cajun Quantity: Item 2: Fancy Tin 3g Flavour: Caramel Quantity: 3