Fritz Furniture sells unfinished wood bookshelves. Recently, the firm contemplated switching to production of painted bookshelves, but it determined its net income per unit for the painted shelves would be $12 lower than that for the unpainted shelves. Shortly after reaching this conclusion, Fritz discovered that it overestimated its fixed production costs for the unfinished shelves by $15 and underestimated its variable production costs for the finished shelves by $10. If Fritz performs incremental analysis using the correct cost estimates, it will find that the net income per unit for the painted shelves is now $22 less than that for the unpainted shelves. the net income per unit for the painted shelves is now $3 greater than for the unpainted shelves. the net income per unit for the painted shelves is now $17 less than that for the unpainted shelves. the net income per unit for the painted shelves is now $13 greater than for the unpainted shelves.