sparklingway
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i think the writer is right.
lets assume the raw material to be iron ore... in the first stage it is brought out from some mine and therefore brining its value from zero to 100. 15% tax takes this price to 115.
in the next stage value addition of 20 takes place. 15% tax on it equals around 3. meaning now the price will be 115+20+3=138
in the final stage another 20 is added to the value. 15% tax on this added value would mean another 3. taking the final price at 138+20+3=161
total tax paid= 15+3+3= 21
pirce minus tax= 100+20+20=140
21 is around 15% of 140
meaning......... it doesnt matter if u charge the tax at the end or during different value added stages
Oh crap. I read the first numbers to be 158 and hence assumed wrong calculation. She did it the right way - tax on additional value. My fault. Apologies.