Need help please help me!!!!!!

[gabz456]

anybody help me with adding codes...

i must put salary
example..

if encoder checked, it must compute 1500 * .03 and display it..
if Cashier 2000
Accountant 4000
Dept. Head 7000
Asst. Manager 8000
Manager 9500


please really need ur help

<INPUT TYPE=RADIO NAME=number1 onclick="gabz" VALUE="Encoder"> Encoder </br>
<INPUT TYPE=RADIO NAME=number1 onclick="gabz" VALUE="Cashier"> Cashier </br>
<INPUT TYPE=RADIO NAME=number1 onclick="gabz" VALUE="Accountant"> Accountant </br>
<INPUT TYPE=RADIO NAME=number1 onclick="gabz" VALUE="Dept. Head"> Dept. Head </br>
<INPUT TYPE=RADIO NAME=number1 onclick="gabz" VALUE="Asst. Manager"> Asst. Manager </br> 
<INPUT TYPE=RADIO NAME=number1 onclick="gabz" VALUE="Manager"> Manager </br> </br>