1.

If a is the base amount expenditure, b is the increase in the operation cost each year over a period of n years, the total cost of maintenance is :

A. a + (n + 1) b
B. a + (n - 1) b
C. a x (n - 1) b
D. a - (n - 1) b
Answer» C. a x (n - 1) b


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