background
banknote
bill
budget
business
cable
cash
concept
connection
consumption
cord
cost
currency
current
economy
efficiency
electric
electrical
electricity
energy
environment
equipment
euro
europe
european
expense
expensive
finance
financial
high
home
increase
industry
light
money
outlet
pay
payment
plug
power
price
property
rise
save
socket
supply
technology
wall
waste
wire