Hi all

There are some complex tax calculations to be performed. For eg. Excise is calculated on an abatement provided value of the Maximum Retail Price (MRP) of a products. Two more taxes are then calculated on this Excise amount. Assuming the client is going to ROUND() at 0 precision - no decimal places.

Qty * MRP = Amount
3 * 560.1257 = 1680.3771

Amount - Abatement % = Assessable Value
1680.3771 - (1680.3771 * 25 / 100) = 1260.282825

% of Assessable Value = Excise
1260.282825 * 4 / 100 = 50.411313

% of Excise = Education Cess
50.411313 * 2 / 100 = 1.00822626

% of Excise = S&H Education Cess
50.411313 * 1 / 100 = 0.50411313

Assessable Value + Excise + Edu. + S&H = still more taxes to be added :)
1260.282825 + 50.411313 + 1.00822626 + 0.50411313 = 1,312.20647739

Except Qty and MRP, where is it mathematically suggest (if I may say so) that ROUND() be applied so that decimals are removed and set to the nearest integer

Please advise.