Question 1064719
Add up all thr ingredients
2 1/2 + 4 1/2 = 7
and
2 1/4 + 3/4 = 3
and
7 + 3 = 10 cups total
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1 serving is 3/4 cup
200 servings is 600/4 cups
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( 600/4 ) / 10 = 600/40
600/40 = 15 
15 batches of the recipe are needed
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Definitely get a 2nd opinion on this
This is just my read on it