The Function Given Below Gives the Cost to Manufacture X $h = 0.0001$

Short Answer

The function given below gives the cost to manufacture x items. Estimate (using $h = 0.0001$ ) the instantaneous rate of change of the total cost at the production level $x = 80$ .
​ $C ( x ) = 14,700 + 100 x + \frac { 900 } { x }$ ​
Enter your answer as a number without the units rounded to the nearest tenth.