Answer:
B 30 percent
Explanation:
Initial cost of production = (2Ă—$10) + (5Ă—$4) + (8Ă—$3) = $20+$20+$24 = $64
New cost of production = (2Ă—$10) + (5Ă—$8) + (8Ă—$3) = $20+$40+$24 = $84
% rise in cost of production = (new cost - initial cost)/initial cost Ă— 100 = (84 - 64)/64 Ă—100 = 20/64 Ă— 100 = about 30%