Cow and Tractor Cakes

I made these cakes for a little boy's first birthday!  They are all yellow cake with black, white, pink, green, orange, and gold buttercream icing.  The cow was made to look like the cow in Sandra Boynton's Barnyard Dance, and I modeled the tractor off one of my little boy's tractors outfitted with tread, steps, lights, a grate, and a caution sign. 

The cost for these cakes was:
Cakes: $1.84 x 2 = $3.68
Icing: $2.43 x 5 = $12.15
Wrapping: $3.65
Labor: $6 x 6.7 = $40.20
Total: $59.66