Savitt Ltd manufactures a variety of products at its industrial site in Bosongo. One of the products, the LT, is produced in a specially equipped factory in which no other production takes place. The costs of producing LTs in the special factory during the past four years have been as follows:

	1998	1999	2000	2001
Raw materials	70,000	100,000	130,000	132,000
Skilled labour	40,000	71,000	96,000	115,000
Unskilled labour	132,000	173,000	235,000	230,000
Power	25,000	33,000	47,000	44,000
Factory overheads	168,000	206,000	246,000	265,000
Total production costs	435,000	583,000	754,000	786,000
Output (Units)	160,000	190,000	220,000	180,000

Required:

Use linear regression analysis to estimate the relationship of total production costs to volume (the regression line of the form y = a + bx) for the product LT for the year 2002.

NB: Do not undertake a separate regression calculation for each item of cost.