a man sold two calculators for Rs.399 each. on one he gained 5% and on the other he loss 5%.find his total gain or loss%

respected mam i know the answer but i don't know how to show it solved.please help me by giving me a hint to show it solved

S.P of each calculator = 399

So let the two cost prices be x and y.

So,

So total C.P =x+y = 800

Total S.P = 798

So total loss = 800-798 = 2.

So overall loss percent

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1st find the SP Then add CPs.if cp-sp or sp-cp

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