An animal food company must produce 200kg. of a
mixtureconsisting of ingredients x1 and x2
daily. x1 costs rs.3/- per kg. and x2 rs.8/-
per kg. no more than 80 kg. of x1 can be used and at
least 60kg. of x2 must be used. formulate a lp. model
tominimize the cost.