In conjunction with the June 2017 Public Offering, the Company issued to certain affiliates of the underwriters, as compensation, warrants to purchase an aggregate of 4,313 shares of common stock (216 shares as adjusted for the May Stock Split), at an exercise price of $125.00 per share ($2,500.00 as adjusted for the May Stock Split),. The warrants are exercisable at the option of the holder on or after June 21, 2018 and expire June 21, 2023. The fair value of warrants was calculated utilizing a Black-Scholes model and amounted to $63,796. The fair market value of the warrants as of the date of issuance has been included in issuance costs in additional paid-in capital.

In conjunction with the Purchase Agreement in April 2019, the Company also sold warrants to purchase up to an aggregate of 42,388 shares of common stock (2,119 shares as adjusted for the May Stock Split), at an initial exercise price of $27.50 per share ($550.00 as adjusted for the May Stock Split),. The warrants are exercisable at the option of the holder on or after October 29, 2019 and expire October 29, 2024. The Company issued to certain affiliates of the underwriters, as compensation, warrants to purchase an aggregate of 4,239 shares of common stock (212 shares as adjusted for the May Stock Split), at an initial exercise price of $27.50 per share ($550.00 as adjusted for the May Stock Split),. The warrants are exercisable at the option of the holder on or after October 29, 2019 and expire April 24, 2024.

In conjunction with the Underwriting Agreement in August 2019, the Company issued to the underwriter, as compensation, warrants to purchase an aggregate of 2,250 shares of common stock (112 shares as adjusted for the May Stock Split), at an initial exercise price of $21.25 per share ($425.00 as adjusted for the May Stock Split),. The warrants are exercisable at the option of the holder on or after February 1, 2020 and expire August 29, 2024.

In conjunction with the Underwriting Agreement in May 2020, the Company issued to the underwriter, as compensation, warrants to purchase an aggregate of 300,000 shares of common stock (15,000 shares as adjusted for the May Stock Split), at an initial exercise price of $3.14 per share ($62.80 as adjusted for the May Stock Split),. The warrants are exercisable at the option of the holder on or after November 6, 2020 and expire May 5, 2025. During the year ended December 31, 2021, 226,300 (11,315 shares as adjusted for the May Stock Split), warrants were exercised and converted into common stock of the Company. The Company has received proceeds of approximately $707,000 from the exercise of the warrants.

In conjunction with the Purchase Agreement in October 2021, the Company also issued Series A warrants to purchase up to 1,898,630 shares of Common Stock (94,932 shares as adjusted for the May Stock Split), in a concurrent private placement. The warrants are have an exercise price of $4.80 per share, ($96.00 as adjusted for the May Stock Split),, exercisable at the option of the holder on or after October 26, 2021 and will expire five years from the date of issuance.

In conjunction with the issuance of the Debenture in February 2023, the Company issued the Peak Warrant to purchase 500,000 shares of common stock (25,000 shares as adjusted for the May Stock Split),.The Peak Warrant expires five years from its date of issuance. The Peak Warrant is exercisable, at the option of the holder, at any time, for up to 500,000 of shares of common stock (25,000 shares as adjusted for the May Stock Split), of the Company at an exercise price equal to $2.25 (the “Exercise Price”) ($45.00 as adjusted for the May Stock Split),, subject to adjustment for any stock splits, stock dividends, recapitalizations and similar events and in the event the Company, at any time while the Peak Warrant is outstanding, issues, sells or grants any option to purchase, or sells or grants any right to reprice, or otherwise disposes of, or issues common stock or other securities convertible into, exercisable for, or otherwise entitle any person the right to acquire, shares of common stock, other than with respect to an Exempt Issuance, at an effective price per share that is lower than the then Exercise Price. In the event of any such anti-dilutive event, the Exercise Price will be reduced at the option of the holder to such lower effective price of the dilutive event, subject to a floor price of $0.40 per share ($8.00 as adjusted for the May Stock Split),, unless and until the Company obtains shareholder approval for any issuance below such floor price. The initial fair value of the Peak Warrant amounted to $278,239 and was recorded, in combination with common stock issued above, as a debt discount of $354,329 at the time of issuance of the Debenture.

Warrant activity or the year ended December 31, 2023 are summarized as follows:

Warrants	Number of Warrants			Weighted Average Exercise Price	Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
Outstanding and exercisable - January 1, 2023	126,091		$	94.80	3.80		-
Granted	25,000			45.00	-		-
Expired	(216	)
Exercised	(25,019	)
Outstanding and exercisable - December 31, 2023	125,856		$	93.60	2.75	$	-

The fair value of warrants granted during the year were valued using a Black-Scholes Value model, with the following assumptions

Risk-free interest rate	4.48	%
Contractual term	5 years
Dividend yield	0	%
Expected volatility	103	%