8 kls = $90.00 = 90*8 =720--------- 1
12 kls = $55.00 = 55*12 = 660 --------- 2
Then the mixture of both is 20 Kls
Total of equation 1 & 2 is 1380
So , the mixture of 1 kls = (1380/20) = $69 / kls
Last edited by brosnan123; Jun 25th 2013 at 04:18 AM.