custom php form with multiply text box

[rajkumarvaishna]

I need a custom php form with multiply text box, 

If customer enter 100 in text box and choose monthly, its charge 100, if some one insert 100 and select quarterly then it need to multiply 100X3 = 300. If some one can do it. please help me.

Thank You

[dhavalshah]

I can implement it for you. Let me know if you need to.

Regards,

Dhaval