Allocate values by month and by spend category

	Your dates show the 17th of each month, which I'm guessing is an irrelevant complication. Can we assume you're talking about whole months and not subdividing amounts by fractional months? – fixer1234 12 mins ago
	I'm guessing you were busy re-entering things manually while I was embedding your original image. I rolled this back to the "pretty" version because I didn't notice any substantive changes. If you were actually changing things, we'll need to do some code formatting so your manual entries are readable. – fixer1234 8 mins ago
	You show two events and none of the expense categories overlap. Can we assume that they could possibly overlap? So, for example, if both events had am advertising expense, those allocations would be consolidated by month on the advertising line in the second table? – fixer1234 3 mins ago