Solve this question by writing all the steps and matrix involved in the problem.

A company is taking bids on four construction jobs. Three contractors have placed bids on the jobs. Their bids (in lakh of rupees) are given in the table below. A "*" indicates that the contractor did not bid on the given job. Contractor-1 can do only one job, but Contractor- 2 and 3 each can do as many as two jobs. Job-1 Job-2 Job-3 Job-4 Formulate this as a balanced assignment Contractor-1 50 46 42 40 problem and obtain the minimum cost Contractor-2 51 48 44 assignment of jobs to the contractors. Contractor-3 47 45 45 * UR *