George Caloz & Frres, located in Grenchen, Switzerland, makes luxury custom watches in small lots. One of the companys products, a platinum diving watch, goes through an etching process. The company has recorded etching costs as follows over the last six weeks:

Week	Units	Total Etching Cost
1	12	$ 26
2	11	22
3	13	28
4	9	19
5	12	25
6	14	28
	71	$ 148

For planning purposes, management would like to know the variable etching cost per unit and the total fixed etching cost per week.

Exercise 5A-5 Part 2 (Algo)

2-a. Using the least-squares regression method, estimate the variable etching cost per unit and the total fixed etching cost per week.

2-b. Express these estimates in the form Y = a + bX.