Question 1210545
.
Gorimapa Nigeria plc has just received an order for it's bathroom cabinet which is made up of two kinds
that is standard and deluxe. The order is for at least 200 bathroom cabinets of either varieties and including
at least 60 of the deluxe kind.
The standard model takes 4 hours of the assembling time and has a valuable cost of #4000 whereas
the deluxe model takes 5 hours of assembling time and has a valuable cost of #6000 .
There are 400 hours available for assembling time. The equipment can be used to assemble either kind
of cabinet in any combination. The company's manager engages you as an expert and wishes to minimize
the company's cost of this special order. You are required as an expert to formulate this problem
in a linear programming form and using the graphical method advise the manager on the best product
that will enable his firm to minimize it's cost
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The answer in the post by @CPhill (125 standard cabinets, 60 Deluxe cabinets) does not satisfy 
the restriction of 400 hours: 125*4 + 60*5 = 800 hours, which greatly exceeds the restriction of 400 hours.


It also does not satisfy the requirement "at least 200 bathroom cabinets", since 125 + 60 = 185 is less than 200.


So, @CPhill solved DIFFERENT problem from what is posed in the post.


He made it even without explicit announcement/declaration about changing the problem, 
which is inappropriate practice and can confuse a reader.


For the correct treatment of the problem, see the post by @ikleyn at this spot,
where it was shown that the problem, as posed in the post, has no solution, at all.