HELP

 The transport problem by criterion of cost is considered. At three suppliers ?1, ?2, ?3 112,89,199 units of some homogeneous cargo are concentrated accordingly. This cargo should be transported to four consumers ?1, ?2, ?3, ?4 which demand is accordingly equal to 95,150,85,70 units of cargo. To solve a problem if quantity of cargo at the third supplier to increase on 50; from the first supplier to
To solve a problem if quantity of cargo at the third supplier to increase on 50; from the first supplier to
to the third consumer it is necessary to send cargo not less than 30 ???.??.; from the second supplier it is necessary for fourth consumer to send cargo no more than 40 ???.??.

???. ??. = standard units