Uncle Sam is the owner of two dairy farms, Excel Linear Programming help

Uncle Sam is the owner of two dairy farms – the goats farm and the cows farm. Each farm can supply 600 litres of milk every week. Uncle Sam has contracts to supply milk with Coles (400 litres per week), Woolworths (300 litres per week), IGA (250 litres per week) and a group of small independent stores (150 litres per week in total). A shipping cost (in cents) of a litre of milk from each of the two farms to the four customers is given bellow. See picture 2 
The total production cost at each farm is a function of the amount produced at the farm. The production cost for cow milk is (2C^2)-C+15 and the total production cost for goat milk is(G^2)+0.3G+10. What is the optimal production and shipping plan for cow and goat milk if Uncle Sam wants to meet customers’ demands at the lowest total cost?
 1. Formulate a mathematical model to find the optimal production amounts at each farm and the shipping amounts from each farm to each customer.
2. Solve the problem in Excel.
3. How much milk will be produced at each farm during the week?
 4. How much milk will be shipped from each farm to each customer?
 5. What is the total cost?

.Present your answers to the question in a worddocs and  your  calculated results in excelsheet.