1.
see ring 1
2.
If a shop assistant rings up a sale on a cash register, he or she presses the keys in order to record the amount that is being spent.
She was ringing up her sale on an ancient cash register.
PHRASAL VERB: V P n (not pron), also V n P
3.
If a company rings up an amount of money, usually a large amount of money, it makes that amount of money in sales or profits.
The advertising agency rang up 1.4 billion dollars in yearly sales.
PHRASAL VERB: V P n (not pron)