Silver Products has presented the following information for the past eight months operations:

Month	Units	Total Cost
April	8,000	$	30,400
May	6,400	$	25,800
June	3,800	$	18,300
July	5,600	$	23,200
August	7,000	$	26,000
September	8,400	$	28,420
October	7,800	$	26,500
November	6,800	$	25,700

4. Using the high-low method, calculate the variable cost per unit.

5. Using the high-low method, calculate the fixed cost per month.

6. What would total costs be for a month with 5,000 units produced?

I can't tell if I use April or Septembers information please help