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Question: i posted this earlier i need help with how to...

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I posted this earlier. I need help with how to do each step.
I don’t know where to begin. Can you explain as you go and answer the questions please?

Excel Project 1 Purchasing Merchandise Number of Department Purchased Purchase Number cost in SIA] inSIBI Orders IC] Suppliers IDI 2,059,000 119,566,000 5,944 1,533,000 68,315,000 4,357 1,066,000 33,505,000 2,793 1,622,000 139,312,000 1,707 875,000 128,811,000 2,125 1,110,000 33,456,000 2,550 1,755,000 38,674,000 3,617 539,000 29,854,000 1,327 557,000 1,729,000 2,523,000 877 1,519,000 86,225,000 1,954 1,548,000 102,875,000 7,586 1,267,000 130,944,000 4,731 190 132 Miami Baltimore New York Toronto Detroit Chicago St. Louis Phoenix Los Angeles Houston San Francisco Seattle Vancouver 208 121,160,000 1,433 168 168 104 201 Q1. Run an OLS regression of A on B. Q2. Run an OLS regression of A on C. Q3. Run an OLS regression of A on D. Q4. Find the best cost driver for the cost of the Purchasing Department. Q5. What are your decision criteria? Q6. According to your regression model, what is a variable cost and a fixed cost of A? Q7. How much variations in A were explained by your cost driver? Q8. What is the relevant range of your model?
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