Cat Math explains all.
If Dog = A (10)
If Cat = B (10)
B = A - (breath, walkies, pooper scoopers, leg humping, drool, idiot dependency, butt sniffing, crap eating, car chasing, ghost howling, inappropriate public grooming and crotch mining)
For a product of A= 10B
(this is the short version of the proof)
Anyway - should be chargin' $39.99 for hot pussy action ....
(jkn .... proud owner of a Dane ...)