Technical and Allocative Efficiency

Listed below are several possible input combinations for producing $7,500$ units of a pocket PC$.$ Two of the input combinations are technically efficient.

Materials Labor Energy

Unit input prices $$100$ $ $60$ $ $25$

Input combinations:

A $100192720$

B $110180540$

C $150200600$

D $92190570$

Required:

$1.$ Identify the technically efficient input combinations.

$2.$ Which of the two technically efficient input combinations should be used?