Mill's Methods. Click on the circle for which of Mill's Methods is being used in each of the following lice. eitherAgreement, Difference, Concomitant Variation, Residues or Joint Method). After realizing a loss of $100,000 a department store's chief accountant could suggest only three causes: an excessive number of clerks, increases in utility rates, and damage to merchandise caused by a flood. These expenses were estimated at $25,000, $30,000, and $10,000, respectively. Since no other ordinary sources could be found, the accountant attributed the remaining $35,000 to shoplifting a) Residues b) Agreement c) Difference d) Concomitant Variation