Slab type $1$ needs $2$ man$-$hours of process A$,3$ hours of process B and $1$ hour of process C while slab type $2$ needs $5$ hours of process A$,1$ hours of process B and $1$ hour of process C$.$ The profits from manufacturing and selling the slabs are: $2$ $$/$slab type $1$ and $1$ $$/$slab type $2.$