That would be about 3 1/4 to 3 3/4 cups, sifted. The grade of sugar 10X or 4X will make a very slight difference and moisture will make a bigger difference.
That is 0.188 cups
Almost 2 cups.
Sightly more than 2 cups
That is approximately 21 cups of sugar.
15 oz = 1-7/8 (or 1. 875) cups
That is approximately 0.70 cups
That is approximately 29.2 cups of sugar.
That is approximately 2 cups
35
That is about 0.838 of a cup.
for butter or marg its 4 cups but since its icing sugar its different, therefor 1 oz = 2 1/2 Tbsp. so 32 oz. = 80 Tbsp. or 5 Cups
About 0.46 cups
half cup
That is 1/4 cup