Answer:
The capital structure weight of debt is 60.53% as shown below
Explanation:
In order to determine the weight of the debt financing in the company's structure, it is important to determine the market value of the common stock ,preferred stock and the debt financing,afterwards each market value can then be measured  as a fraction of total market values of all the three financing arrangements in order to determine the weighting of each.
Financing          Volume    Mkt price   mkt value      Weighting
Common stock      7400      $97      717800
Debt               720     $2000*1.1    1584000         60.53
Preferred stock       6300     $50       315000
Total                                 2616800
The weighting for debt is 1584000/2616800= 60.53