X Ltd. supplies spare parts to an air craft company Y Ltd. The production capacity of X Ltd. facilitates production of any one spare part for a particular period of time. The following are the cost and other information for the production of the two different spare parts A and B: Per unit Part A Part B Alloy usage... 1.6 kgs. 1.6 kgs. Machine Time: Machine A.. 0.6 hrs. 0.25 hrs. Machine Time: Machine B.. 0.5 hrs. 0.55 hrs. Target Price (*).. 145 115 Total hours available: .Machine A 4,000 hours Machine B 4,500hours Alloy available is 13,000 kgs. @ 12.50 per kg. Variable overheads per machine hours:....... Machine A: 80 Machine B: 100 Required () Identify the spare part which will optimize contribution at the offered price. (ii) If Y Ltd. reduces target price by 10% and offers 60 per hour of unutilized machine hour, what will be the total contribution from the spare part identified above