Interest on a savings account is calculated at 0.3% per month based on the minimum monthly balance. The following statement lists all the transactions on an account for January–March one year. The interest, in dollars, for the month of February is:

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We need to determine the interest for February, given 0.3% monthly interest based on the minimum monthly balance.
First, extract the balances from the transaction table for January through March. The starting balance on Jan 01 is 275.00. After the Jan 07 withdrawal of 50.00, the balance becomes 225.00.
In February, there is a deposit on Feb 03 of 846.10, which increases the balance to 225.00 + 846.10 = 1071.10. There are no further transactions in February.
The key is the minimum balance during February. Since the balance on Feb 03 before the deposit was 225.00 and remains 1071.10 after the deposit, the minimum balance in February is 225.00.
Compute the interest: 0.3% of the minimum balance = 0.003 × 225.00 = 0.675. When expressed in dollars and rounded to the nearest cent, this is $0.68.
Therefore, the February interest amount is $0.68.

Interest on a savings account is calculated at 0.3% per month based on the minimum monthly balance. The following statement lists all the transactions on an account for January–March one year. The interest, in dollars, for the month of February is:

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