Question 1208344
This was not checked carefully yet, and this much done quickly:


Remain after Allan took:  {{{0.6m-1}}}


Remains after Ben took:  {{{0.6m-1-0.25(0.6m+2)}}}


Caleb took all the remaining 12.

{{{0.6m-1-0.25(0.6m+2)=12}}}
Solve for m.


{{{m=30}}}
<i>wrong: based on grouping symbols mistake in steps (not shown)</i>