See: Numbers, Machinery, Money
To see someone you know well using a calculator indicates that circumstances may soon bring out a colder, more calculating, side of this person.
If you are totaling up a bill, or a debt, that someone owes you, it is an omen that you will have to dun someone to receive your money or your property back.
If you are calculating your monthly bills, or debts, it is an omen that you will soon have harassing business worries.
