MAX     60 DESKS + 30 TABLES + 20 CHAIRS
SUBJECT TO
   2)   8 DESKS + 6 TABLES + CHAIRS <=   48
   3)   4 DESKS + 2 TABLES + 1.5 CHAIRS <=   20
   4)   2 DESKS + 1.5 TABLES + 0.5 CHAIRS <=   8
   5)   TABLES <=   5
END