Brief Exercise 20-05 Pine Street Inc. makesurfinished bookcases that sells for $58. Production costs variable and $10 fed. Because it has unused capacity, Pine Street is considering fishing the bookcases and sing them for $74. Variabile finishing costs are expected to be $7 per unit with no increase in foed costs. Prepare an analysis on a per unit bass showing whether Pne Street should sell finished or shed backcases. (Enter negative amounts using either a negative in preceding the number .45 of parentheses eo (45).) Further increase (Decrease) Sales price per units Cost per unit Variable Fored Net income per un The back