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Alex sold it to Shewata at 5% loss at Rs. 1330
So cost price for Alex = 1330× (100/100-5) = Rs. 1400

Vinod had sold it to Alex at 12% gain at Rs. 1400
So CP for Vinod = 1400× (100/100+12) = Rs. 1250

Vinod had paid Rs. 1250 for the watch.
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I tried and it went on like something and i did not get the ans but you did it so simple. thanks a lot
You are welcome!