Fast-food restaurants like McDonald’s are replacing cashiers with touch-screen ordering kiosks. Currently, the marginal product of another cashier is 48 customers served per hour; the marginal product of another kiosk is 32 customers served per hour. A cashier can be hired for a wage of INR 300; a kiosk rents for Rs 150. a. Is McDonald’s currently minimizing the cost of serving its customers? b. If there is a scope, show how McDonald’s can improve its profits by changing its input mix.
Answers
Explanation:
a. Whataburger is not using the optimal cost-minimizaing mix of cashier and kiosks.
b. Whataburger should hire more cashier and rent fewer kiosks in order to improve its mix of inputs and minimize the cost
Explanation:
a. According to the given data we have the following:
Let "C" is a cashier.
"K" is a kiosk
MPC = 48 (Marginal Product of Cashier)
MPK = 32 (Marginal Product of Kiosk)
PC = $15 (cashier can be hired for a wage of $15)
PK = $12 (Kiosk rents for $12)
At optimal cost minimization point, (MPC / MPK) = (PC / PK)
(MPC / PC) = (MPK / PK)
(MPC / PC) = (48 / 15) = 3.2
(MPK / PK) = (32 / 12) = 2.67
Since the (MPC / PC) and (MPK / PK) is not equal. It implies Whataburger is not using the optimal cost-minimizaing mix of cashier and kiosks.
b. We have to use the following:
(MPC / PC) > (MPK / PK)
i.e., 3.2 > 2.67
It means Whataburger hire more cashier and rent fewer kiosks in order to improve its mix of inputs and minimize the cost.
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