5. CONVERTIBLE NOTES PAYABLE, NET

In July 2019, we paid off our Convertible Notes Payable. We paid the remaining principal balance of $892,591 and accrued interest of $11,352. As a result, we did not incur any interest expense related to the Convertible Notes in the three months ended September 30, 2019.

For the six months ended September 30, 2019, we recorded interest expense of $23,759 related to the contractual interest rates of our convertible notes and interest expense of $30,287 related to the amortization of the note discount for a total interest expense of $54,046 related to our convertible notes.

Convertible Notes Payable, Net consisted of the following at March 31, 2019:

During the six months ended September 30, 2018, we recorded interest expense of $49,630 related to the contractual interest rates of our convertible notes and interest expense of $60,574 related to the amortization of the note discount for a total interest expense of $110,204 related to our convertible notes in the six months ended September 30, 2018. All of the unamortized discount at September 30, 2018 related to the note discount established upon the June 2017 amendment to the November 2014 10% Convertible Notes and to the December 2016 10% Convertible Notes.