The old man Li Yu in the nursing home celebrated his birthday. Volunteers invited a total of 48 old people and staff to celebrate the old man's birthday. The volunteers prepared a bottle of mineral water and an apple for each person. It is known that a bottle of mineral water is 2 yuan, and each apple is 2.5 yuan. How much money should volunteers bring to purchase?
老人院的李玉老人过生日，义工邀请院里的老人和职工一共48人为老人庆生，义工要给每人准备一瓶矿泉水和一个苹果．已知矿泉水每瓶2元，苹果每个2.5元，义工至少要带多少钱才够用于采购？
<gadget id="calculator">48 + 1</gadget>
<output>49</output>

<gadget id="calculator">49 * 2</gadget>
<output>98</output>

<gadget id="calculator">49 * 2.5</gadget>
<output>122.5</output>

<gadget id="calculator">98 + 122.5</gadget>
<output>220.5</output>

<result>220.5</result>