Question 740885
<pre>
---------------------------------------------------------------
                price          pounds          costs
---------------------------------------------------------------
nellie           1.2             30-c          1.2(30-c)
breakdown        1.4               c           1.4c
wreck(blend)     1.35            30            1.2(30-c)+1.4
----------------------------------------------------------------
</pre>
To account for cost  {{{1.35*30=1.2(30-c)+1.4c}}}

{{{1.35*30=36-1.2c+1.4c}}}

{{{1.35*30=36+0.2c}}}

{{{c=(1.35*30-36)/0.2}}}


{{{c=22.5}}}, the pounds of Breakdown
which means {{{7.5}}}, the pounds of Nellie