Chemical Engineering Plant Economics
Pick out the correct statement.

Difference between income and expense is termed as gross revenue
Unamortised cost is the difference between the original cost of a property and all the depreciation charges made to dat
Scrap value is the net amount of money obtainable from the sale of used property over and above any charges involved in its removal & sale
Sum-of-the-years-digits methods of depreciation calculation accounts for the interest on the investment