Money, payment, purchase

a package, a plan (internet, mobile phone, etc.)

a sum of money, a total (don’t confuse the gender, masculine ‘UN somme’ means ‘a nap’)

the price, the price list, the fares, the rates

expenses, cost ('des/les frais' is only plural)

one hundred euros (don’t say ‘UN cent’)

one thousand euros (don’t say ‘UN mille’)

the bank details (‘RIB’ is an acronym, it actually doesn’t refer to the bank details themselves but to the paper on which they’re written)

the check / the bill (in restaurants, bars, cafés)

un prêt immobilier, un emprunt immobilier, un crédit immobilier

an invoice, a bill (electricity, gas, phone...)

to pay, to deposit (also means 'to pour')

to refund (also means 'to repay, to pay off')

gagner sa vie (je gagne ma vie, tu gagnes ta vie...)