Concentrations

6 Months Ended

Jun. 30, 2016

Notes to Financial Statements

8. Concentrations

During the three months ended June 30, 2016, three vendors represented 45%, 19% and 18% of total inventory purchases and 47%, 17% and 16% of total inventory purchases for the six months ended June 30, 2016.  During the three months ended June 30, 2015, two vendors represented 69% and 11% of total inventory purchases and of total inventory purchases for the six months ended June 30, 2015.

Two vendors represented 41% and 31% of the accounts payable balance as of June 30, 2016.  Two vendors represented 43% and 13% of the accounts payable balance as of December 31, 2015.