A bottle of milk costs 3.5 yuan, which is 2.85 yuan cheaper than a bottle of Coke. How much does it cost to buy a bottle of each of the two drinks?
一瓶牛奶售价3.5元，比一瓶可乐的价钱便宜2.85元，两种饮料各买一瓶共需要多少钱？
<gadget id="calculator">3.5 + 2.85 + 3.5</gadget>
<output>9.85</output>

<result>9.85</result>