Answer:
Swifty Corporation
The actual interest for Swifty Corporation is:
$2,418,300
Explanation:
a) Data and Calculations:
Expenditures were 
on March 1,          $6,380,000 
on June 1,            $5,270,000
on December 31 $8,350,000
Borrowings:
on January 1 on a 5-year, 12% note = $3,240,000  Interest =   $388,800
Note payable, 10%, 3-year =                $6,380,000  Interest =  $638,000
Note payable, 11%, 4-year =               $12,650,000  Interest = $1,391,500
Total interest for Swifty Corporation = $2,418,300
b) Computation of interests:
12% note = $3,240,000 * 12% = $388,800
10% note = $6,380,000 * 10% = $638,000
11% note = $12,650,000 * 11% = $1,391,500