At my local grocery store, that 3 packet strip costs $1.57. Each packet is 1/4 ounce, or 7 grams. I purchased Fleischmann's Active-Dry yeast in bulk, for $6.48, in a 2 lb bag. This is the exact same product, but sold in a bulk bag. Each packet above contains .25oz, 7 grams, or 2 1/4 tsp of yeast. It works out to 49 cents a packet for .25 oz. I can get the equivalent of 128 packets out of the 2lb bulk bag, which works out to 5 cents for the same .25 oz. Huge difference in my opinion. Yeast can be stored in a tightly sealed container in the freezer, and you can use it frozen. Active Dry yeast can also be bought in small 4oz brown jars. Rapid Rise or Bread Machine Yeast can be bought in either the 4oz jars or the 3 packet strip. When I had the bread machine yeast, I stored the jar in the refrigerator.
While I'm talking about yeast, let me explain about another kind: Instant Dry Yeast. Instant yeast differs from Active-Dry Yeast in that it doesn't need to be proofed (or activated) in warm water first. You can add it directly to your dough in with the dry ingredients. You can use it in recipes in place of the active-dry yeast or in place of bread machine yeast. It's convenient and a quicker, easier to use yeast.