Rate of exchange-conversion-foreign currency wef 03-01-14

Have you noticed that Export rates are 2% lower then Import Rates.........

Which mean if i Import $100 goods and pay CVD 12% at 1% loaded value at 62.35 = 756.

If one Export back at $100 rebate of ED at 61.35 = 736

So 20/- is sure gain for Government Exchequer for each $200 Trade ...... there should be no spread for Export / Import , it should be single Exchange rate at Customs