Xiao Ming has multiple RMB denominations of 1 yuan, 2 yuan and 5 yuan. He wants to use no more than 10 of them to buy a kite with a price of 18 yuan. He requires at least two denominations of RMB, so different payments How many ways are there?
小明有多张面额为1元、2元和5元的人民币，他想用其中不多于10张的人民币购买一只价格18元的风筝，要求至少用两种面额的人民币，那么不同的付款方式有几种？
<gadget id="calculator">7 + 1 + 2 + 1</gadget>
<output>11</output>

<result>11</result>