Late in May $($prior to harvest$)$ you make a sale of $100,000$ bushels of wheat on a forward contract with a buyer at $+20$

DEC for October delivery.

The sale is priced with the buyer and you purchase DEC futures.

In June $($harvest$)$ you purchase $100,000$ bushels of wheat at a basis of $-20$JUL which you will later deliver to the buyer.

As you purchase wheat from the farmers you sell JUL futures.

What must you do to complete this transaction?

Buy $20$JUL futures.

Buy $20$JUL futures $/$ Sell $20$ DEC futures.

Buy $20$ DEC futures $/$ Sell $20$ JUL futures.

Buy $20$ DEC futures.