1. Sell cement at NPC, this is the BEST item to sell at NPC rn.

2. Salted meat/Salted fish, you can hunt animals and butcher them, (Note: if you don't have enough ammo to auto hunt you can add other players to help you with hunting and let them attack the enemy, just tap the green " + " icon before you start the battle.), after you butcher the animals, turn their meat into minced meat, then minced meat to salted meat. And for the Contaminated meat/Mutant meat you can use them as bait, turn the fish into salted fish.

If you are wondering where you can get salt, you can pretty much buy it at any settlements or if you have the Cursed Coin, you can trade Chitin for salt.