Time to sort through the Fast Money in-box and answer more of your questions.

What is the best way to invest in copper and aluminum? Companies? ETFs? -Tom, CA

Buy Freeport-McMoRan , Guy Adami said. Goldman put FCX on its conviction buy list and the stock is still cheap.

Do you still believe Monsanto is good stock in inflationary times?
-Beth, TX

The agriculture trade is alive and well, said Tim Seymour. Monsanto can work independent of domestic growth. It showed that in its earnings.

Jeff: Last week you were up on the airlines. With a pullback in oil today and all the airlines posting negatives, how do you feel now?
-Robert, ME

The whole group is just too hard to play. Even though they look like they’ve bottomed, Jeff said, the market conditions aren’t right for them to go higher.

Karen: I know you own American Eagle . At what price does it become cheap enough to you again that you would add more to your position?
-Jameson, TX

AEO is a cash-rich company, Karen said. If the stock dips below $20 she sees that as a good point to buy more or initiate a purchase.

______________________________________________________
Got something to say?! Send us an e-mail at fastmoney-web@cnbc.com and your comment might be posted on the web!  Prefer to keep it between us. You can still send questions and comments to .

Trader disclosure: On Feb.21, 2008, the following stocks and commodities mentioned or intended to be mentioned on CNBC’s Fast Money were owned by the Fast Money traders: Macke Owns (INTC), (YHOO); Seymour Owns (AAPL), (CSCO), (F), (MSFT), (S), (TSO), (SBUX), Seygem Asset Management Owns (CCJ), (TIE), (GAF) Seygem Asset Management Is Short (EEM); Finerman’s Firm is Short (IYR), (IJR), (SPY), (MDY), (IWM), (LEH) and Owns (LEH) Puts; Finerman’s Firm Owns (VLO), (TSO), (MSFT), (KSS), (JCP), (AAPL), (TSO), (VLO), (YHOO), (WMT), (MO), (AEO); Finerman Owns (GS); Dennis Gartman Owns (CIM), (COIN), (PRB), (SID), (PAL), (UNG), Gold, (UUP), (SWC), (HOV), (GWR), (GMO); Gartman is Short (SDS), (COH), (HOG), (RTH), (MMM), (GM), (DCR), (AAPL), (DRYS), CIBC; Gartman Index Owns Gold, the EUR, the Canadian Dollar, Sugar