They made 4/5 with butter...that means they made 1/5 without butter.
1/5 of what is 35.2.....
1/5x = 35.2
x = 35.2 * 5
x = 176 oz
1 lb = 16 oz...so 176 oz = 176/16 = 11 lbs <===
check...
1/5 (176) = 176/5 = 35.2 oz without butter
4/5 (176) = 704/5 = 140.8 oz with butter
for a total of (35.2 + 140.8) = 176 oz, which equals 11 lbs