Complex production planning 

A company plans to produce 3 products in a 22 working day month.

The prices, production costs, maximum quantities that can be produced for each 
product (the time it would take to produce only that product on that day) are 
shown in the table below:

Product             A1    A2     A3
-----------------------------------
Unit price        $124   $109   $115
Production cost   $73.30 $52.90 $65.40
Max pcs/day       500    450    550

B) Complete the model if minimum production 
quantities are given:

Product            A1 A2 A3
-----------------------------------
Min quantity       20 20 16

How does the solution change?


C) Complete the model if there are activation costs, 
i.e. this is a fixed cost of producing the product:

Product           A1      A2     A3
-----------------------------------
Activation cost $150000 $150000 $100000

It is possible not to produce it and then there is no extra cost!

How does the solution change?