I have locations that have various future leases that I would like to summarize into one column. So I have option dates and I would like to calculate the number of months from the first option date to the second one and then the second one to the third one and so forth up to 15 potential option dates. So for the table below. The first location (1) I would only have one option which is for 60 months so I would like it to display like what you see in the [Future Option] column (3/1/209 to 3/1/2034 = 60 months) So 1 option for 60 months or 1 X 60.
For location 2 I have two remaining options. (1/1/2028 to 3/1/2033 = 62 months), (3/1/2033 to 3/1/2038 = 60 months). Example data loaded.

Table below only to try and show my manual work and how I got to the future years.
