Glass Corp. produces a part used in the manufacture of one of its products. The unit product cost is $50, computed as follows:

Direct Materials	$ 17
Direct Labor	13
Variable Manufacturing Overhead	9
Fixed Manufacturing Overhead	11
Unit Product Cost	50

Glass has the opportunity to buy the part from an outside supplier for $43 each. If Glass buys the parts it can eliminate all variable manufacturing costs and 30% of the fixed manufacturing overhead.

Based on this data, the per unit financial advantage (disadvantage) of purchasing the parts from the outside supplier is: