Sir it has already been discussed many times search forum
On short " dollar rate add one rupees to it then add 3% of it "
Eg
1:if dollar rate buying is 104 rupees , adding 1 rupee to it =105
2:If an item say 20 dollar then 20+3%= 20.6
3:Now 20.6 x 105= 2163rupees
Hope it clears
Sent from my iPhone using Tapatalk