Answer:
Korbin Company
Selected Comparative Financial Statements:
1. KORBIN COMPANY  Comparative Income Statements
For Years Ended December 31, 2017, 2016, and 2015
                                       2017         %           2016        %            2015        %
Sales                         $515,770    100%   $395,122  100%   $274,200   100%
Cost of goods sold    310,494      60%    250,507    63%      175,488     64%
Gross profit               205,276      40%      144,615    37%        98,712     36%
Selling expenses        73,239       14%       54,527    14%         36,194     13%
Admin.  expenses       46,419        9%        34,771      9%        22,759      8%
Total expenses         119,658       23%      89,298     23%       58,953     21%
Income before taxes  85,618       17%        55,317      14%       39,759     15%
Income taxes             15,925         3%        11,340        3%          8,071       3%
Net income             $69,693        14%   $43,977        11%      $31,688     12%
2. KORBIN COMPANY
Balance Sheet Data in Trend Percents
for December 31, 2017, 2016, and 2015
                                                   2017            2016             2015
Assets
Current assets                        100.00 %          78%             105%   
Long-term investments          100.00            500%          3,690%
Plant assets, net                     100.00             107%             64%
Total assets                            _124__%       _121_ %       100.00 %
Liabilities and Equity
Current liabilities                    _104_ %       _103__ %     100.00 %
Common Stock                       100.00           100%             75%
Other paid-in capital               100.00           100%            66%
Retained earnings                  100.00             92%            84%
Total liabilities and equity      _124_ %         _121_ %      100.00
Explanation:
a. Data:
KORBIN COMPANY
Comparative Balance Sheets
December 31, 2017, 2016, and 2015
                                                  2017             2016             2015
Assets
Current assets                    $53,867       $42,145        $56,338
Long-term investments            0                   500            3,690
Plant assets, net                 100,040       106,805           63,791
Total assets                      $153,907     $149,450        $123,819
Liabilities and Equity
Current liabilities               $22,470     $22,268         $21,668
Common stock                     71,000        71,000           53,000
Other paid-in capital              8,875          8,875             5,889
Retained earnings               51,562        47,307           43,262
Total liabilities & equity  $153,907    $149,450         $123,819
b) In an income statement vertical analysis, each line item is calculated as a percentage of the sales, which is itself 100%.  This enables the proportional analysis of all the items to be computed about their financial performance in relation to the sales for the period.  It can help management to dictate unusual items, errors, and other outliers.
c) The balance sheet trend analysis shows whether the entity's financial position is improving or not in relation to the base period.  Each item is compared horizontally across periods.  The calculation of trend uses the amount in the non-base year and divides it by the amount of the base year x 100.