The sales tax rate in Riverton is 7%. During a seasonal clearance at the Riverton Retailer, the price of a jacket is discounted 10% from its $150.00 price. Two cashiers, Alice and Bob, calculate the bill independently. Alice rings up $150.00 and adds 7% sales tax, then subtracts 10% from this total. Bob rings up $150.00, subtracts 10% of the price, then adds 7% of the discounted price for sales tax. What is Alice's total minus Bob's total?
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