Mercedes is assessing which of windshield suppliers provides a better environmental design for disassembly. Using the table below, select between PG Glass and Glass Unlimited.

PG Glass
Part	Resale Revenue per Unit	Recycling Revenue per Unit	Processing Cost per Unit	Disposal Cost per Unit
Glass	$13	$10	$8	$1
Steal frame	1	1	1	2
Rubber insulation	2	3	2	2

Glass Unlimited
Part	Resale Revenue per Unit	Recycling Revenue per Unit	Processing Cost per Unit	Disposal Cost per Unit
Reflective glass	$16	$13	$8	$4
Aluminum frame	5	4	1	3
Rubber insulation	1	1	1	2

The revenue retrieval for PG Glass design is ___________

(enter your response as a whole number).