calculating based on a range of variable depth (VBA)

Hi all, normally I have been able to stumble across my own solutions but am having trouble with this one. See attachment for reference. I am trying to have the excess cash flow line calculate as EBITDA less the sum of the expenses below. The first expense is always on line 6 and there are always the same number of years for this (C:J). The number of expenses is variable and could be anywhere from 3-10. This graph is being pulled from data on another page via VBA and should function without user input. This line is the only one I haven't been able to figure out.

Please point me in the right direction as I have tried this from a few direction, with little success.

Thanks for looking!