• Profile photo of John Moffat says

      Having got the totals for each of the four departments (after adding the relevant proportions of general overheads) you then recharge the total for maintenance using the given percentages.

      Then you take the new total for repairs and and recharge it – again using the percentages given.

      (You could do repairs first, and then maintenance. However it would take a little longer because you would then have to do repairs again. However it would give the same final answer.)

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