sum · noun C /sʌm/
sum
B1 an amount of money
Dictionary examples:
Huge sums of money are spent on cleaning up the oil spill.
The sum involved in the sale was not reported.
Learner example:
My poor aunt Yutta [h]as died and she's left me a big sum of money. (Preliminary English Test; B1; Italian)
sum · verb /sʌm/
sum up (sth/sb) or sum (sth/sb) up
B2 to describe briefly the most important facts or characteristics of something
Dictionary example:
The oral report should sum up the main points of the written essay.
Learner example:
To sum up, young people are interested in many things but in my opinion, music, TV and clothes are issues about which they care more than others. (First Certificate in English; B2; Greek)