Metlock Inc makes unfinished bookcases that it sells for $60. Production costs are $37 var iable and $9 foxed. Because it has unused capacity. Metlock is considering finishing the bookcases and selling them for $73. Variable finishing costs are expected to be $7 per unit with no increase in fuxed costs. Prepare an analysis on a per-unit basis that shows whether Metlock should sell unfinished or finished bookcases, (If an amount reduces the net income then enter with a negative sign preceding the number, es. 15,000 or parenthesis, eg. (15,000)/J