Buying sugar cookie supplies during rush-hour on a weeknight: $12.32
Taking the D.C. Metro subway system to your co-worker's house, holding tightly to the three dozen sugar cookies rolled lovingly into tiny little gingerbread men by one harried momma and three over-enthusiastic rolling-pin wielders: $7.50
Buying last-minute powdered sugar, milk, and food coloring supplies to decorate three dozen sugar cookies (because your co-worker is a swinging bachelor and apparently NEVER cooks): $8.62
Breaking into "The Muffin Man" bit and screeching "Not my gumdrop buttons!" over and over again at the top of your lungs while decorating tiny little gingerbread men at the holiday staff party at your co-worker's house: Priceless.