custom calculation for total box in Adobe Acrobate

[Sathish314789579sod]

Hi Experts,

I am trying to get create custom function but i completely new to this editable form. Please any one could help that would be great !

I have a pdf form (Editable). I want calculate into total box based another input box and selection from dropdown list like:

Box 1 = 15 if Dropdown like = Weekly

it would be calculate 15 *5

Box 1 = 15 if Dropdown like = Fortnightly

it would be calculate 15 *2

Box 1 = 15 if Dropdown like =Monthly

it would be calculate 15 *1

Box 1 = 15 if Dropdown like = Annually

it would be calculate 15 *12

Same there input box and dropwonlist as image show 

Can you please help to create custom function based on my inputs. I am calucating on Total box.

[try67]

Set those numbers as the export values of the items in the drop-down, and then just multiply the drop-down by the text field to get the correct result (you can do it using the Product option in the Calculate tab).