We let the price or cost of Brand A be x and Brand B be y
[tex]x+y=42,000[/tex]... [1]
And
[tex]\frac{12x}{100} + \frac{8y}{100} =4,400 \\ \frac{3x+2y}{25} =4,400 \\ 3x+2y=110,000[/tex]... [2]
[2]-2[1]
[tex]3x+2y=100,000[/tex]
[tex]2x+2y=84,000[/tex]
[tex]3x+2y-2x-2y=110,000-84,000 \\ x=26,000[/tex]
[tex]26,000+y=42,000 \\ y=16,000[/tex]
a) The cost of brand A is P26,000 and brand B is P16,000
b) Brand A - P26,000*0.12= P3,120
Brand B- P16,000*0.8= P1,280
c) I will sell brand A to maximize my savings since it has higher commission. And of course you would let your clients buy brand A since it has higher commission for you.