In this video guide I will show you how you can spend 500 consumable resources on crafting. Now to collect the resources you basically just need to loot everywhere. You can get some by looting enemies you've killed and dead bodies have some as well. So in time you will accumulate enough, it shouldn't take more than a few times stocking up on everything all the way to max. Just make sure to fill everything up from ammo, grenades, med-kits, and filters. There is also an ammo and a throwing capacity upgrades as well to help with this.