I want to calculate the response time during working hours between two dates & times.
Scenario 1: A request comes in at 10:00 on 19/9/2018 and I respond at 11:00 on same day i.e. 19/9/2018
Scenario 2: A request comes in at 11:30 on 19/9/2018 and I respond at 10:30 next day i.e. 20/9/2018...