The Case of the Unidentified Industries - 1995
Solution:
In order to find out the exact firm by analysing the financial structure of typical firms, first we need to separate those firms which have zero inventory turnover (A, B, F and H) from those firms which have zero debt ratio which in our case are (E, H and J) and we use the information to narrow down the possibilities of each firm. In this case there are three groups of companies: 1) Firms having zero inventory turnover. 2) Firms having zero debt. 3) Firms having all financial ratios given.
1) Firms having zero inventory turnover:
Under the category of zero inventories, there are four companies. The nature of these companies show that they are not involved in any production, but they provide services to the people and from services they generate cash. Each one with the name and reason is mentioned below.

Firm A. Commercial Bank:
The financial structure of (A) firm shows that it has zero inventory turnover and high receivables collection period. Banks usually have a large amount of receivables because they lend money to the individual people and a company due to which the average number of days, which in this case is very high, requires to convert receivables into cash is very high. Its financial structure also shows that the firm has borrow money from outside to pay debt to its customers.

Firm B. Advertising Agency:
This firm has very high receivables and payables due to one reason or the other. The advertising agencies have large number of customers and most of them are credit customers. On the other hand the high expenses show that this firm is paying off its current liabilities by collecting cash from its customers because their customers are core business in generating profit.
Firm F. Airline: Again this firm has zero inventory turnover which shows that this perform