Question 891968
{{{20(( 2/3 + 2/3 + ( 1/3 + (1/3)*0.25 ))-1 )}}}
In the above, {{{ 2/3 + 2/3 }}} comes from the fact
that for each 2/3 bushel, sales covers the original
cost plus an additional 2/3 or double the production
cost.
For the remaining 1/3 bushel, sales cover the original
1/3 plus 25% of the 1/3.
Now, let's simplify
{{{20(( 2/3 + 2/3 + ( 1/3 + (1/3)*0.25 ))-1 )}}}
{{{20(( 4/3  + ( 1/3 + 1/12 ))-1 )}}}
{{{20(( 4/3  + ( 4/12 + 1/12 ))-1 )}}}
{{{20(( 4/3  + ( 5/12 ))-1 )}}}
{{{20(( 16/12  + ( 5/12 ))-1 )}}}
{{{20(( 21/12  ))-12/12 )}}}
{{{20(( 9/12  )) )}}}
{{{180/12}}}
15
Notice that if the original expression,
20(( 2/3 + 2/3 + ( 1/3 + (1/3)*0.25 ))-1 )
is put into a calculator or solver we get 15.
Try entering into www.wolframalpha.com