Just cutting back on the amount of eyeliner and lipstick she uses should double the amount of money they'd have available to spend on other things...like food. There'd probably be enough food that someone other than David could eat.
Agreed. If Jill posted more pictures of her looking like this, she'd probably have a line of suitors.
As for statistics classes, my professor taught us using roulette as an example. I don't remember much other than always bet red or black.