CITIZEN CT-666 - Manual (Page 35)

Cost is $2000
Sell is $2800
Margin=?%
[ON/AC]
2000 [COST]
2800 [SELL]
0.
COST
CT 2000.
MARGIN
M= 28.57
Sell is $1850
Margin is 20%
Cost=?
[ON/AC]
1850 [SELL]
20 [%] [MARGIN]
0.
SELL
SL 1850
COST
C= 1480.00.