A store is selling a black pair of shoes for $79.45 and a brown pair of shoes for $133.99. the black pair of shoes is marked up by 44%, and the brown pair of shoes is marked down by 21%. which pair of shoes is more expensive, and how much more expensive is it? round all dollar values to the nearest cent.
a. the black pair costs $6.82 more than the brown pair.
b. the black pair costs $8.56 more than the brown pair.
c. the brown pair costs $9.72 more than the black pair.
d. the brown pair costs $12.54 more than the black pair.