A certain class is going to buy some sporting goods, basketball is 35 yuan each, football is 45 yuan each. I bought 4 basketballs and 1 football, and after paying the advance payment, I got 15 yuan back. How much was the advance payment?
某班准备购买一些体育用品，篮球每个35元，足球每个45元．买4个篮球和1个足球，预支货款后补回了15元，原来预支了多少元？
<gadget id="calculator">35 * 4</gadget>
<output>140</output>

<gadget id="calculator">1 * 45</gadget>
<output>45</output>

<gadget id="calculator">140 + 45 + 15</gadget>
<output>200</output>

<result>200</result>