Investor inventory

I invest in my friend in car dealership. I have $50K to buy cars. He bought all cars for $50K, but only sold $20k worth of cars. 

do I put beginning inventory as 0, purchases as $50k, ending inventory as $30k, COGS $20k? 

assume I received $25k as 1099

 

Or should I add $50 as total expense and $25 as gross revenue?