4.Eldorado Co., located in Ingersoll, Ontario, collected $1,130 including taxes from a customer. Assuming that Eldorado Co. pays a combined PST/GST rate of 13%, 5.calculate (a) sales, Cash $1130 Sales $1000 HST Payable $130 Formula : 1130 (total cash price) /(1+ tax rate )= sales price without tax and (b) harmonized sales taxes payable