Calculating Interest for the balance at month end

[BeesKnees]

How do I calculate interest at the end of each monthyear for the Balance and showing at the end of the period. 

MonthYear	SalaryDate	ContibutionType	Amount	Balance
02/2020	29/02/2020	Opening Balance	658005.3	658005.3
03/2020	01/03/2020	Nett Member	1633.28	659638.6
03/2020	01/03/2020	Nett Company	978.17	660616.7
04/2020	01/04/2020	Nett Member	1633.28	662250
04/2020	01/04/2020	Nett Company	978.17	663228.2
05/2020	01/05/2020	Nett Member	1633.28	664861.5
05/2020	01/05/2020	Nett Company	978.17	665839.6
06/2020	01/06/2020	Nett Member	1633.28	667472.9
06/2020	01/06/2020	Nett Company	978.17	668451.1
07/2020	01/07/2020	Nett Member	1265.08	669716.2
07/2020	01/07/2020	Nett Company	1158.51	670874.7
08/2020	01/08/2020	Nett Member	1265.08	672139.7
08/2020	01/08/2020	Nett Company	1158.51	673298.3
09/2020	01/09/2020	Nett Member	1265.08	674563.3
09/2020	01/09/2020	Nett Company	1158.51	675721.8
10/2020	01/10/2020	Nett Member	1265.08	676986.9
10/2020	01/10/2020	Nett Company	1158.51	678145.4
11/2020	01/11/2020	Nett Member	1265.08	679410.5
11/2020	01/11/2020	Nett Company	1158.51	680569
12/2020	01/12/2020	Nett Member	1265.08	681834.1
12/2020	01/12/2020	Nett Company	1158.51	682992.6
01/2021	01/01/2021	Nett Member	1048.57	684041.2
01/2021	01/01/2021	Nett Company	940.56	684981.7