英文關鍵字
abraham
america
and
bank
banking
barter
brown
business
buy
capital
cash
cent
cents
change
circular
coin
coinage
coins
commerce
copper
cost
currency
dinero
economics
economy
finance
financial
funds
government
invest
investment
lincoln
many
metal
money
payment
pennies
penny
price
purchase
quantity
retail
round
salary
save
spend
states
stock
trade
united
usa
value
video
wage
wealth