5. Inventories

6 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories are valued at the lower of cost (determined on a first-in, first-out basis) or net realizable value, and have been reduced by an allowance for excess and obsolete inventories. The estimate is based on managements review of inventories on hand compared to estimated future usage and sales. Cost of work-in-process and finished goods inventories include material, labor, and manufacturing overhead.

	December 31, 2019		June 30,2019
Raw materials	$	1,927,500	$	1,738,300
Work-in-process		340,400		106,400
Finished goods		735,900		747,600
	$	3,003,800	$	2,592,300