Calculate the margin on this short$-$the$-$basis transaction:

Make a sale of soybeans in June for immediate delivery at $+50$ JUL.

Deliver soybeans during May from your inventory that farmers have yet to price but which you have title to under the terms of a Deferred Price Contract.

Pay $10$ freight for delivery.

Receive payment for the soybeans.

Spread JUL$/$AUG at $\mathrm{.}10$ inversion.

Price soybeans farmers have on Deferred Price Contract at $+15$ AUG during July and pay them for the beans.

Earn $5$ interest $($total$)$ on the money you held for the two months.