Chemical Engineering Plant Economics
'P' is the investment made on an equipment, 'S' is its salvage value and 'n is the life of the equipment in years. The depreciation for rath year by the sum-of years digit method will be

2(n - m + 1)/n(n + 1) x (P - S)
1 - (P/S)1/m
M/n x (P - S)
(P - S)/n

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Chemical Engineering Plant Economics
Which of the following relationship is not correct is case of a chemical process plant?

Total product cost = direct production cost + plant overhead cost
General expenses = administrative expenses + distribution & marketing expenses
Manufacturing cost = direct product cost + fixed charges + plant overhead costs
Total product cost = manufacturing cost + general expenses

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