im stuck on these problems , please help, thank you

Mohave Corp. makes several varieties of beach umbrellas and accessories. It has been approached by a company called Lost Mine Industries about producing a special order for a custom umbrella called the Ultimate Shade (US). The special-order umbrellas with the Lost Mine Company logo would be distributed to participants at an upcoming convention sponsored by Lost Mine. Lost Mine has offered to buy 1.800 of the US umbrellas at a price of $14 each. Mohave currently has the excess capacity necessary to accept the offer. The following information is related to the production of the US umbrella: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Total cost Regular sales price $ 6.00 3.00 2.50 2.50 $14.00 $22.00 Required: 1. Compute the incremental profit (or loss) from accepting the special order. Profit (or Loss) Increases by 11 2. Should Mohave accept the special order? Yes 3. Suppose that the special order had been purchase 2,300 umbrellas for $9.00 each. Recompute the incremental profit (or loss) from accepting the special order under this scenario. Profit (or Loss Decreases by $ 5,600 4. Assume that Mohave is operating at full capacity. Calculate the special-order price per unit at which Mohave would be indifferent between accepting or rejecting the special order. Special Order Price $ 9 Xper Unit