Texas Instruments Calculator - Manual (Page 98)

94 Appendix — Reference Information
where:
OLD
=old value
NEW
=new value
%CH
=percent change
#PD
=number of periods
Profit Margin
Breakeven
PFT
=
P Q
N (
FC
+
VC Q
)
where:
PFT
=profit
P
=price
FC
=fixed cost
VC
=variable cost
Q
=quantity
Days between Dates
With the Date worksheet, you can enter or compute a date within the
range January 1, 1950, through December 31, 2049.
Actual/actual day-count method
Note: The method assumes the actual number of days per month and
per year.
DBD
(days between dates) =
number of days II - number of days I
Number of Days I
= (
Y
1 - YB
) Q 365
+ (
number of days MB to M1
)
+ DT1
+
Number of Days II
=(
Y
2 -
YB
) Q 365
+ (
number of days MB to M2
)
+
DT2
+
Gross Profit Margin
Selling Price Cost –
Selling Price
----------------------------------------------- 100 × =
Y1 YB – ( )
4
------------------------
Y2 YB – ( )
4
------------------------