Maximum / Minimum price

Hi,
I have 2 Shippings methods with "HikaShop manual shipping plugin".

First manual shipping method free for screen :
Price : 0
Maximum weight : 3 kg

• It's free shipping for our screen
• its prices is over 300 $ and its weight is under 2.8 kg

I have also an other shipping with cost 20 $ for others metérials :

Second shipping method standard with cost 20 $ for all of our products without screens :
Price : 20.00000
Minimum weight : 3 kg

• This metérials is over 15 $ and its weight is over 3.2 kg

If users buy with those metérials (without screens) the shipping cost 20 $
If users buy with those metérials and screens the shipping cost 20 $
If users buy only screens the shipping is free

I'm happy because It works.

Now I have a special sale campaign for all of our products without screens.

If users buy over 100 $ to those metérials (without screens) I offer free shipping (for exemple : 5 key USB (5x25$) = 125 $)
If users buy under 100 $ to those metérials (without screens) the shipping cost 20 $ (for exemple : 1 key USB (1x25$) = 25 $)
If users buy under 100 $ to those metérials and screens the shipping cost 20 $ (for exemple : 1 key USB (25$) + a screen (300$) = 325 $)
If users buy only screens, this shipping is free.(for exemple : 2 screen = 600 $)

How can I do it ?

I tried this but it doesn't work :
I did not touch "First manual shipping method free for screen".
I changed "Second shipping method standard with cost 20 $ for all of our products without screens" like this :
Price : 20.00000
Minimum weight : 3 kg
Maximum price : 100

and I add new one :
"third shipping method (sale campaign) free over 100 $ for metérials none screens" :
Prix : 0.00000
Minimum weight : 3 kg
Minimum price : 100

But I can not obteint what I would like. It does not work.
Whit this 3 methods I obteint this :
If users buy only screens, this shipping is free with ""First methods"" : It is right (it works).
If users buy over 100 $ to those metérials (without screens) by free shipping with """third methods"" : It is right (it works).
If users buy under 100 $ to those metérials (without screens) its shipping cost 20 $ with """Second methods"" : It is right (it works).

But when the users buy under 100 $ to those metérials ( for exemple 2 mouses for (20 $) and also a screen the shipping is free with """third methods"" : It is bad (I don't want this).
the shipping must cost 20 $ in this case.

Can you halp, please.

thanks

It's very nice, thanks