HP 12c Solutions Handbook page 158

S
• Smoothed average S
• Change, C
• Trend, T
t
•
Current period expected usage,
•
Forecast of next period expected usage,
• Error, e =
t
•
Cumulative error =
•
Initial conditions: S
Pricing Calculations
Markup and Margin Calculations
• Ma = margin(%).
• Mu = markup(%).
• S = selling price.
• C = cost.
3n
∑
= Iny
3
i = 2n + 1
= X
t
= S - S - 1
t t t
= C + (1 - )T - 1
t t
t - X
t
∑
t = 1
= X
t-1 t-1
T = 0
t-1
2n + 1
= n c ln + b
i
+ (1 - )S - 1
t t
2
e t
157
n
b – 1
-------------- -
ln a
b 1
–