Hide Rate & value in inventory voucher

Hello everyone,

I am hiring a person for stock transfer entry and I don't want to show him the item rate and its total value. He can only enter the item name and its quantity.

I used the following code but skip function is not working.
And also I want to make this option enable only in inventory voucher.
If I have to pass sales entry, these option will be enabled.

Please help

Code:

[#Field:vch rate]
     Skip: Yes
    Color:"White, ReleasedBrown"
  
[#Field:vch value]
     Skip: yes
    Color:"White, ReleasedBrown"
  
[#Field:vch valueTotal]
    Skip: Yes
    Color:"White, ReleasedBrown"

He can't see these