With explanation please :)

ABC Enterprises has two support departments ( S1 and S2 ) and two producing departments ( A and B ). Information is summarized in the following table. (1) Compute the cost allocated from S2 to B using the direct method. (2) Compute the total cost of A after allocation using the direct method. (3) Write down the simultaneous equation system that are needed to solve for the reciprocated costs of the support departments. Solve for the reciprocated costs. (4) Determine the cost allocated from S2 to S1 under the reciprocal method