who are the stakeholders who may use the Saudi Arabian certificate of conformity

please solve all the parts and explain it in detail... I saw all the solutions in chegg related to this problem but all are wrong and not the right one and right solution please solve it and let me know ASAP

The Engine Guys produces specialized engines for "snow climber" buses. The company's normal monthly production volume is 2,500 engines, whereas its monthly production capacity is 5,000 engines. The current selling price per engine is $650. The cost per unit of manufacturing and marketing the engines at the normal volume is as follows: Required: Answer the following independent questions. 1-a. The Provincial Bus Company wishes to purchase 610 engines in October. The bus company is willing to pay a fixed fee of $300,000 and reimburse The Engine Guys for all manufacturing costs incurred to manufacture 610 motors. October is a bsy month for The Engine Guys, and there are sufficient orders to operate at 100% capacity utilization. There will be no variable marketing costs on this government contract. Compute the incremental benefit of the contract. 1-b. Indicate whether the Provincial Bus Company's contract should be accepted. 2-a. An outside contractor is willing to supply 1,250 engines at a price of $312 per unit. If the offer is accepted, the company will make 1,250 engines in-house and buy 1,250 engines from the contractor. The company's fixed manufacturing costs will decline by 20% and the variable marketing costs per unit on the 1,250 engines purchased will decline by 40%. Calculate the cost in each option. (Do not round intermediate calculations. Leave no cells blank - be certain to enter " 0 " wherever required.) 2-b. Determine whether the contractor's offer should be accepted? Yes No