crunch numbers: do calculations

throw money out the window : waste money without thinking

cost/pay an arm and a leg for something: pay a high price for something

hit the jackpot: make a lot of money suddenly

make ends meet: have enough money to pay one`s bills

chip in: contribute money or pay jointly

born with a silver spoon in one`s mouth: born to wealth and comfort, born rich

flat broke : having no money, penniless

nest egg: money someone has saved up

dirt cheap: extremely cheap

Go Dutch : something where each person pays their own share

feel like a million dollars/bucks : feel wonderful

loan shark: someone who lends money at a very high rate

on a shoestring: with little money to spend, on a very low budget

bring home the bacon: earn the family living