Calculate period between multiple dates _VBA script

Hi All,
Could you help me with excel VBA to calculate period between multiple dates. I have a big data , data has multiple dates are in there. I know how to calculate period between two dates but these are 3 and 4 dates on in it. Date format is MM/DD/YYYY format. If I get any VBA script that would be great. For example, Please refer attachment.

Many thanks in advance.Thanks for your help