Crazy Bride Sends Itemized Bill to Party Guests

A bride sent out an itemized bill to her Bachelorette party attendees and... it's crazy. She calculated everything down to the sent; even soft drinks (24 cents each) and popcorn (28 cents each). 

The whole scenario is just bizzare to me. You really have to write all that out? You couldn't just have a net cost and divide that by 7? Also... why are you throwing your own bachelorette party?