drupal commerce separate shipping for different products
You can add a shipping service dedicated for for qwerty key board and similar items and a shipping calculation that checks for a certain product in the cart. Use:
Event: Calculating a shipping rate
Condition: order contain a particular product. 
Action:Add a rate for a shipping service to an order and select the shipping service that is dedicated for qwerty key board and similar items. 

It may be easier for you to clone one of the existing shipping rate calculation and edit as needed.