What is the probability of rolling an even number and then an odd number when rolling two number cubes?

Size of sample spaces =
Number of desired outcomes =
P(first is even and second is odd) =

Tom is going on vacation and wants to leave his friend enough money to feed his pets. tom has d dogs and c cats and spends $2.50 per day to feed each dog and $1.75 per day to feed each cat. how much do it cost to feed his cat in a week