Answer:
It can be said that there's a credit transaction of 119.13 into Tristan's that raised his checking account balance from 268.53 to 387.66 between the beginning and end of the month.
Explanation:
As at the beginning of the month, Tristan's checking account balance was 268.53. As the month progressed, there was a credit transaction of 119.13 into his account. By implication, his monthly bank statement showed a balance of 387.66 at month end as against 268.53 he had as at the beginning of the month. Should Tristan call for his bank statement to ascertain the actual amount that led to his increased account balance, he subtracted 268.53 from 387.66 and got 119.13. Hence, it can be said that there's a credit transaction of 119.13 into Tristan's that raised his checking account balance from 268.53 to 387.66 between the beginning and end of the month.