Solve Write a Mixed Numeral for the Answer $3 \frac{1}{2}$ Cups of Flour

Multiple Choice

Solve. Write a mixed numeral for the answer.
-Amy decided to bake bread and a cake. For the bread she needed $3 \frac{1}{2}$ cups of flour. For the cake she needed $1 \frac{2}{3}$ cups of flour. She had $6 \frac{3}{5}$ cups of flour. How much flour did she have left over?

A) $2 \frac{13}{30}$ cups
B) $1 \frac{9}{30}$ cups
C) $1 \frac{13}{30}$ cups
D) $2 \frac{9}{30}$ cups