Enter how many users (computers) you want to totally have?
You will need this many Host (shared) PCs
You will need this many PC-Station sets (a set has 3 terminals)
Purchase cost of an all PC approach (birr)
Purchase cost of PC-Station based approach (birr)
Just on purchase you save (birr) 
 
On electricity bills over one year you save (birr) 
On maintenance fees over one year you save (birr) 
Overall savings over one year period (birr) 

Assumptions: Dell PC = 5400 | LCD = 1900 | PS/2 Mouse = 68 | PS/2 Keyboard = 115
Electricity/Kwh = 0.72 | Running Hours/Day = 10 | Maintenance/PC/Year = 800
Note: Cost of network cable has not been included.