18. Joe owns 1,000 shares of Reno Corporation common stock which he purchased in 20X6 for $10,000. On 5-30-X9 he purchases an additional 300 shares for $2,000. On 6-20-X9 he sells the original 1,000 shares for $7,000. On 7-15-X9 he purchases 450 shares of Reno Corporation stock for $5,000. What is Joes recognized gain or loss as a result of the sale of the stock and what is the basis of the shares purchased on 7-15-X9, respectively?

c. $ 750 loss; $6,350 basis

I have the correct answer, but I do not know how to get there.