Problem 11 (2005 AMC 8)

The sales tax rate in Bergville is $6\%$. During a sale at the Bergville Coat Closet, the price of a coat is discounted $20\%$ from its \90.00$price. Two clerks, Jack and Jill, calculate the bill independently. Jack rings up$$90.00$and adds$6%$sales tax, then subtracts$20%$from this total. Jill rings up$$90.00$, subtracts$20%$of the price, then adds$6%$ of the discounted price for sales tax. What is Jack's total minus Jill's total?