I do apologize - my example assumption was that the excess contribution occurred and included part of both subsequent contributions.
Balance on 10/31 = 1000
Contribution of 300 on 11/10 which includes the 150 excess amount. Interest on 11/30 of 1.00. Interest on 12/31 of 1.10.
Based on your response, the Adjusted Opening Balance is 1300 and does not include the interest. Closing balance is 1302.10 as of 12/31. Is that correct?
