coke machine: 
---------------------------------------| 
 /``/             |   ________         | 
/  /              |   | COKE |   O (1) | 
\  \              |   ````````         | 
 \__\             |   ________         | 
                  |   |SPRITE|   O (2) | 
                  |   ````````         | 
 
and so on... 


the top is 1 second is 2 third from top is 3, ect...

the order you press the buttons is as follows: 4, 2, 3, 1

then, the menu commands are as follows,
1 - enter
2 - up
3 - down
4 - return to last menu

the menu's are as follows
CASH - money in machine
|-CASH - amount of money
|-C1   - dunno
|-C2   - same (theres a bunch of these)

SALE - cokes sold
|-SALE - amount of cokes sold
|-S1   - same drill as CASH

RTN - returns you to coke machine mode

PIN - the serial number
(may not be pin, But its the only other menu.)