Inventory

6 Months Ended

Jun. 30, 2023

Inventory

Inventory

4. Inventory

Inventory stated at cost, net of reserve, consisted of the following:

	June 30,		December 31,
	2023		2022
Raw materials	$	354,175	$	393,253
Work in process		67,736		111,119
Finished goods		106,203		90,850
Total	$	528,114	$	595,222

Inventory write-downs to estimated net realizable values were $14,694 and $ 57,474 for the three and six months ended June 30, 2023, respectively, compared to nil for the three and six months ended June 30, 2022.