You have been provided with the current assets and current liabilities of a retailing firm each quarter for the last 5 years, together with the revenues in each quarter.

Period

Non-cash current assets

Non-debt current liabilities

Revenues

1990 – 1

$300

$150

$3,000

1990 – 2

$325

$160

$3,220

1990 – 3

$350

$180

$3,450

1990 – 4

$650

$300

$6,300

1991 – 1

$370

$170

$3,550

1991 – 2

$400

$200

$4,100

1991 – 3

$420

$220

$4,350

1991 – 4

$755

$380

$7,750

1992 – 1

$450

$220

$4,500

1992 – 2

$480

$240

$4,750

1992 – 3

$515

$265

$5,200

1992 – 4

$880

$460

$9,000

1993 – 1

$550

$260

$5,400

1993 – 2

$565

$285

$5,600

1993 – 3

$585

$300

$5,900

1993 – 4

$1,010

$500

$10,000

1994 – 1

$635

$330

$6,500

1994 – 2

$660

$340

$6,750

1994 – 3

$665

$340

$6,900

a. Based on this information, estimate the non-cash working capital each quarter.

b. Estimate non-cash working capital as a percent of revenues each quarter.

c. Assume that you are told that there are economies of scale, when it comes to inventories. How would you test to see if there are any? What would your conclusions be?