• The company DELTA14 produces 2 items A1 and A2 in two factories U1 and U2: The company must produce at least 50 pieces of each item A1, and A2. The monthly data is as follows: Factory U1 produces an article of A1 in 2 hours, and an article of A2 in 4 hours. Its working capacity is 1500 hours. Factory U2 then completes the production in 3 hours for item A1 and in 2 hours for item A2. Its working capacity is 400 hours. Subsequently, the preparation of one unit of article A1 requires 4 pieces of cardboard, while the article A2 requires only 3 pieces of cardboard; the availability of cardboard is 1000 pieces per month. The unit margin of A1 is €25 and that of A2 is €30.