To find the price of the pair in the department store, we just have to calculate 70% of the wholesale price and then add this value to the wholesale price.
The markup value is
[tex]5.50\times70\%=5.50\times\frac{70}{100}=3.85[/tex]Adding this value to the wholesale price, we have
[tex]5.50+3.85=9.35[/tex]The price of the pair in the department store is $9.35.