Let Q = 14L + 7L^2 L^3 . Compute VMP L at P = Rs 10 and L = 5 units.

To compute the Value of the Marginal Product of Labor (VMP_L), we first find the Marginal Product of Labor (MPL) by differentiating the production function $Q=14L+7L^2-L^3$ with respect to $L$:

$$MPL=\frac{dQ}{dL}=14+14L-3L^2$$

Substitute $L=5$:

$$MPL=14+14(5)-3(5{)}^2=14+70-75=9$$

Now, multiply $MPL$ by the price $P=\text{Rs }10$ to get $VM{P}_L$:

$$VM{P}_L=P\times MPL=10\times 9=\text{90}$$