Approximately 6 1/2 cups. 1 cup of sifted flour weighs approximately 100 grams.* *This can vary from 80 grams to 160 grams due to improper measuring, compacting or a lack of sifting, but generally, this is close.
80 grams of granulated, white sugar is a bit less than of a cup of sugar. You need about 225 grams to equal one cup. 80 grams of light or dark brown sugar also equals a little less than a 1/2 cup. You need about 200 grams to equal one cup. 80 grams of powdered sugar is about equal to 1 cup.
The transformation is not possible. The cup is a unit for volume, not for mass. You need the density of the material. The metric cup is eqivalent to 250 mL; in different countries other volumes are valid.