Brief Exercise 20-05 Pine Street Inc, makes unfinished bookcases that it sells for $60. Production costs are $38 variable and $10 fixed. Because it has unused capacity, Pine Street is considering finishing the bookcases and selling them for $70. Variable finishing costs are expected to be $7 per unit with no increase in fixed costs. Prepare an analysis on a per unit basis showing whether Pine Street should sell unfinished or finished bookcases, (Enter negative amounts using either a negative sigo preceding the number e.g. -45 or parentheses e... (45).) Sell Process Further Net Income Increase (Decrease) Sales price per unit $ Cost per unit Variable Fixed Total Net Income per unit The bookcases