Michael's salary

In season 3, Michael treats all the women in the office to Victoria's Secret items (one item per person). There were six women in total, I guess (Pam, Karen, Phyllis, Angela, Kelly and Meredith) and everyone except Angela took Michael up on his offer. In the same episode, Michael is on the phone with Jan and she asks him to come over, and he says, "I don't know... it's too far. I'm spending a fortune on gas." Which means he's also been shelling out on gas for some time now.

That must not have been cheap. He must have been on a handsome pay if he could afford something like that on a whim.

What do you think?