3. Two alternatives are under consideration for a hexagonal bolt fastening pin. Either design will serve equally well and will involve the same material and manufacturing cost except for the lathe and grinder operations. Design A will require 20 hours of lathe time and 8 hours of grinder time per 10,000 units. Design B will require 10 hours of lathe time and 22 hours of grinder time per 10,000 units. The operating cost of the lathe including labour is $ 400 per hour. The operating cost of the grinder including labour is $ 300 per hour. Which design should be adopted if 10,00,000 units are required per year and what is the economic advantage of the best alternative? 4. A building contractor can source door frames from either a nearby shop or a far-off forest area. The cost details are as summarized in the following table. The total requirement of wood for the construction work is 75 tons. Items Far-off forest area Nearby shop Negligible 900 km Distance to site Transportation cost per ton per km Material cost/ton Negligible $ 2,000 $ 100 $ 1,250 1 EMEN523 Assignment 1 Marks: 15% Find the best alternative for buying the wooden frames. Also find the economic advantage of the best decision