Two stores sell the same model of smartphone, but they offer it at different prices and with different discounts. Store A lists the smartphone at a full price of $125 and offers an additional discount of 8%.  Store B lists the same smartphone for $130 and offers an additional discount of 10%.  After both stores' discounts are applied, how much cheaper is store A's smartphone than store B's smartphone?
Please reason step by step, and put your final answer within \boxed{}.
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