Combine all cereals, nuts and pretzels. Sprinkle with salts. Combine oil, margarine and worcestershire sauce and pour over mixture. Make at 225 degrees for 2 hours, stirring every 15 minutes. (I use the extra chex cereals, increase everything else and make 1 1/2 batches at a time. If you have an electric roaster it works very well, to make this in)