As both the percentage of the total number of hours and the earnings per hour are

given, it is possible to compute from this chart the actual amount of expenditure for each type of project.

2. The chart indicates without computation in which projects earnings are above the

average and which ones fall below.

GRAPHIC PRESENTATION

•f 140 •f 110

•f I to

♦ MO

••> I 00

-♦-9 0

+ 00

•♦• 70

•♦• 60

-♦■ SO

•(- 40

•(- 10

•I- 20

+ I 0 J.R.H. CORP.

». 0

••RIGHT PRICE'*

- I 0

- «0

:vAi

PRIC

ES TOO HIGH

11^

ji

J.R.H. CORP.

■IHIIIII

!■

"RIGHT PRICE**

«....-

IpREVAILING PRICES TOOLOw|

10 20 10 40 SO 60 70 80 90 100

PERCENT OF SALES VOLUME

Churchill EnginrrrinK Corporation, N. Y. C.

The Distortion in Prevailing Prices of Seventeen Itenns of Roofing Products Manufactured by One Connpany in the United States as Determined by the Churchill Engineering Corporation.

Weighting the bars by showing volume as well as price gives a more accurate picture than a simple bilateral chart would Rive. However, a representation of volume is not always necessary.

AREA BAR CHARTS

CHARACTERISTICS OF AREA BAR CHARTS:

1. Useful in presentinj; material which ^ivcs parts of a total.

2. They show in one view two independent {groups of facts.

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