A company makes different coloured pens but has a limited supply of materials. Using the data below, in what order of priority should the pens be made:

	Blue	Black	Red
Sales Price	17.50	21.50	23.75
Material cost per pen	6.40	7.20	10.50
Labour cost per pen	3.00	3.00	3.00

Group of answer choices

Black, blue, red

Blue, black, red

Red, black, blue

Black, red, blue.