well, 1lb = 16oz.
in 12 lbs there are 12*16 oz, namely 192 oz.
since each serving is 12 oz, how many times does 12 go into 192? 12 ÷ 192 = 16.
well, it turns out that the 12lbs case is $54.82, so the 54.82 yields 16 servings then.
how many times does 16 go into 54.82? 54.82 ÷ 16 = 3.42625.