excel - Calculate time elapsed between cells -


i'm looking way calculate time elapsed (passed) between 2 reoccurring events. excel sheet looks this.

  cell    cell b      cell c 1 14-aug-17 8:59:13 pm  quota recovery 2 14-aug-17 8:56:12 pm  quota violation 3 14-aug-17 6:00:12  quota recovery 4 14-aug-17 5:36:12  quota violation 5 14-aug-17 4:00:12  quota recovery 6 14-aug-17 3:51:12  quota violation

something simple b1-b2 give me desired result 1 entry have close thousands cells need perform same calculation on.

is possible automatically calculate , add time between each violation , recovery whole excel sheet give me total amount of time quota violated?

=sumproduct(((a1:a6)+(b1:b6))*(c1:c6="quota recovery"))-sumproduct(((a1:a6)+(b1:b6))*(c1:c6="quota violation"))

similar pnuts comment, using array function , bypassing helper cell. since array formula, make sure define range need.


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