find the cost per kilo of a coffee mixture made from 8 kls of coffee that cost $90 pero kilo and 12 kls of coffee that cost $55 pero kilo.
thanks
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