There are three numbers A, B, and C. The sum of A and B is 5500, the sum of B and C is 5800, and the sum of A and C is 5300. Find the sum of the numbers A, B, and C.
有甲、乙、丙三个数，甲、乙两数之和是5500，乙、丙两数之和是5800，甲、丙两数之和是5300．求甲、乙、丙三数之和．
<gadget id="calculator">5_500 + 5_800 + 5_300</gadget>
<output>16_600</output>

<gadget id="calculator">16_600 / 2</gadget>
<output>8_300</output>

<result>8_300</result>