The mass of a paperclip is 9.0 × 10−4 mg. If a box of paperclips has 6.14 × 104 paperclips, determine the total mass of the paperclips in the box. Write the final answer in scientific notation with the correct number of significant digits.
 2.86 × 100 mg
 5 × 101 mg
 5.5 × 101 mg
 5.526 × 101 mg