I am trying to find a formula that would help me find how many cars overlap and are in the lot at the same time but only when column D is False. I would then want to count how many cars are in the lot at the same time. The start times are located in B2:B7 and end times are in C2:C7. I've tried using a SUMPRODUCT function but was wondering if there was an easier way to go about this and include the function to count the number of cars that overlap.