機器
abacus
account
accountancy
adding
ancient
antique
arithmometer
background
bank
bookkeeping
brown
budget
business
calculation
calculator
close
computation
computing
concept
costs
department
economics
economy
education
estimate
estimation
expenses
failure
finance
insolvency
mathematics
money
office
old
plans
poverty
purse
reckoning
retro
savings
score
stationery
tools
up
vintage
wealth
wood
wooden
workplace