Tax Question

[jcc6252]

I have a question about determining taxable income from buying and selling cards. Here is a hypothetical scenario:

For 2014:

A) Beginning Inventory $30,000
B) Inventory Purchases $35,000
C) Ending Inventory $40,000

D) Inv. Sold (A+B-C) $25,000

E) Gross Sales $33,000
F) Expenses $ 3,000

Would I be responsible for $5,000 (E-D-F) in taxable income?
Or, would it be considered a loss for the year, since I finished the year with $10,000 more (C-A) in my inventory?

Thanks,
-Jim