Comparison of Heliodyne Flat Plate Collectors with and without selective finish
	Service B (9F)
		Black Paint	Sputtered Sel	Black Chrome
	Sunny	33.4	33.2	31.7
	Pcldy	24.2	24.3	23.1
	Mcldy	15.1	15.5	14.6
	Service C (36F)
		Black Paint	Sputtered Sel	Black Chrome
	Sunny	26.3	28.5	26.5
	Pcldy	13.5	19.7	18
	Mcldy	3.5	11.1	9.7
	Service D (90F)
		Black Paint	Sputtered Sel	Black Chrome
	Sunny	13.5	19.4	16.6
	Pcldy	5.7	11.3	8.9
	Mcldy	0.2	3.6	2.1
	Energy Supermarket		410 with black paint $ 1160
			410 with sputtered selective $ 1260			so, +$100 for the selective finish
	Real Goods		410 with black paint $ 1209
			410 with sputtered selective $ 1359			so, +$150 for selective finish