India Ascertaining Landed cost & Profit Margins

[jk.hira17]

Sir,

I want to know if the below given method for ascertaining the landed cost is correct/wrong.
Assuming TVA as 16%.

ITEM NAME : XYZ
QTY: 100
RATE : 25
VALUE : 2500
CUSTOMS DUTY : 400
TVA ON CUSTOMS DUTY : 64
SHIPPING CHRGS : 100
LANDED COST = 2500+400+100 = 3000
LANDED COST/UNIT = 30

GROSS SELLING PRICE/UNIT = 40
GROSS PROFIT/UNIT = 40-30 = 10
GROSS PROFIT MARGIN = (10/40)*100 = 25%

NET SELLING PRICE = GROSS SELLING PRICE - TVA = 40-((40*16)/116) = 34.4828
NET PROFIT/UNIT = 34.4828 - 30 = 4.4828
NET PROFIT MARGIN = (4.4828/34.4828)*100 = 13%

Please correct me if this computation is incorrect.

Thankyou