ILOG CPLEX 10.100, licensed to "university-waterloo, canada", options: e m b q
use=20 
CPLEX 10.1.0: profit = 75

produce [*] :=
 pants  25
shirts   0
shorts   0
;

rent [*] :=
 pants  1
shirts  0
shorts  0
;

labour_cloth [*] :=
 cloth  0
labour  0.5
;

M [*] :=
 pants  25
shirts  40
shorts  53
;