Lesson
#4
Sales Commissions
It
is often necessary
to
write programs that will do one task
if
a condition
is
true and
another if the condition
is
false. This is called branching. In this lesson you will learn
why this concept
is
important and how to implement branching in your programs.
Experiment
#1
Sales Commissions
A salesman is to receive a flat rate commission of
15%
of his total sales. However,
if
the total sales
is
over $2000, then
he
will receive an additional
20%
of the amount
over
$2000.
The formulas are
as
follows:
Commission
= .15 * sales
if
sales are less than 2000
Commission = .15 * sales + .20 * (sales - 2000)
if
sales are over 2000
Clear memory with the NEW command and type the following program:
1121
INPUT
"AMOUNT
OF
SALES";
ST
ZI2I
CM
=
ST
*
.15
3121
IF
ST
>
2121121121
THEN
CM
=
CM
+
.20
* (ST -
2121121121)
4121
PRINT
"COMMISSION
IS";CM
Execute this program.
The program begins by asking you to enter the amount of sales. Type:
1121121121
~
to compute the commission on one thousand dollars sales. Note that a dollar sign is
not entered. The computer will respond with the message
COMMISSION
IS
15121
indicating a commission of $150.
Since the sales were less than
$2000, the commission is a straight fIfteen percent.
RUN the program again and this time when you are asked
to
enter the amount of
sales, type:
3121121121
~
to
compute the commission on three thousand dollars sales. The computer will respond
with the message:
COMMISSION
IS
85121
indicating a commission of $650. Since the sales exceed $2000, the commission will
be
15%
of $3000 plus 20%
of
$1000 (the amount exceeding $2000).
Try running the program using your own sales data and confIrm that the program
computes the commission properly.
45
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