vis doing the right thing, even when no one is watching." S. Lewis Question 28 in the course of your analysis of the maintenance cost for 3 levels of activity (months) using the "least squares method". you 690 Sum of hours Sum of costs Sum of hours x cost Sum or hours squared 2,625 607.250 160.100 The estimated maintenance cost at a normal capacity of 400 hours per month would be P Previous vis doing the right thing, even when no one is watching." S. Lewis Question 28 in the course of your analysis of the maintenance cost for 3 levels of activity (months) using the "least squares method". you 690 Sum of hours Sum of costs Sum of hours x cost Sum or hours squared 2,625 607.250 160.100 The estimated maintenance cost at a normal capacity of 400 hours per month would be P Previous