Sometimes I wonder if people notice that I wear the same 4-5 shirts over and over every week. All of my long sleeve shirts were bought I think from Sears back before their fall, so my cost-per-wear has to be astronomically low by now.
I guess some people have a knack for detail about such things.
Guesstimating your costs: 5 shirts $20 to $40 each (guessing Sears costs) $100 to $200 annual cost or $0.27 to $0.55 daily costs for shirts.
Mine is a European perspective.