@abigale It would have been helpful if you explained how you made your calculations. My calculations seem to be near the amount that you mentioned.
This is how I calculated:
Assume you deposited 10,000 on 1-Jan-2019.
By 1-Feb-2019: Your 10K earns 55 as interest (= 10,000 x 6.6 / 100 / 12 =>...