The total cost $C(x)$ in Rupees,associated with the production of $x$ units of an item is given by $C(x) = 0.005x^{3} - 0.02x^{2} + 30x + 5000$. Find the marginal cost when $3$ units are produced,where marginal cost is defined as the instantaneous rate of change of total cost with respect to the number of units produced.
- A$Rs. 30.015$
- B$Rs. 30.02$
- C$Rs. 30.05$
- D$Rs. 30.10$
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