Multiplier used Increment I estimates Increment J estimates Increment K estimates Increment L estimates  Estimate 1 mi × xi mj × xi mk × xi ml × xi Estimate 2 mi × xj mj × xj mk × xj ml × xj Estimate 3 mi × xk mj × xk mk × xk ml × xk Estimate 4 mi × xl mj × xl mk × xl ml × xl

Table 6: Estimates of each increment.