MC og MR

Hej

Jeg har en opgave som jeg ved ikke hvordan jeg skal gå igang med 

Cost for production and research 800.000 

P=-3/120*X+900

P= the sales price per unit, x = the sale pr unit pr year

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fixed costs for machine 2.4 mill dkk pr. year. startup cost 750000 each year as long as productione continues 

unit cost for toerfoot is

AVC=3/120*X+200

1)

In a coordinate system show the function for sale MC and MR

2) determine graphically the optimal sales price and quantity for AVC

3) calculate the expected annual contribution margen and quantity sold pr year