Murray's Petroleum Company is trying to formulate a cost function for operating expenses in order to predict the future costs. The following information was ascertained from past operations:

X	40
Y	120
XY	466
X2	234
Y2	1434
n	10

From the following information, calculate the following using regression analysis (show all working):

1. variable cost per unit [5 marks]
2. fixed cost [3marks]
3. cost function [2 marks]
4. total cost if 2000litres are produced [3 marks]