Deals with the problem of equitable pricing in a situation where: 1) common facilities are shared by two groups of clientele, with a high incidence of joint costs; 2) the methods of pricing for the two groups are different? one group charged on an "actual cost" basis and the other on fixed price; 3) the "actual cost" charged to one group gets affected by the price charged to the other; and 4) the services rendered to the two groups are claimed to be different -one of the groups.