You, as cost accountant for your company, have suggested that the firm install a budgeting system. You explain to management that you wish to separate each factory overhead item into its fixed and variable components. The factory man- ager argues that this is not possible. To back up his position, he gives you the following example: If production is increased by 1,000 direct labor hours, in- spection costs will remain constant, but for every 3,000 additional hours above that level, inspection costs will increase by $5,000 per month. How will you treat this cost in your analysis?