Taking your bulk discount question first, you can set this up in Seller Admin > Cart Discounts:
- Product: All Cart Items;
- Discount Name: Bulk discount;
- Discount Code(s): [leave blank for an automatic discount];
- Min. Item Qty.: 5;
- Discount: [enter your desired % off here];
- Applies to: Item Total;
Click Submit to save the discount.
This help page explains our discount settings in detail:
http://www.e-junkie.com/ej/help.discounts.htm
Now, for the shipping calculation you described, go to Seller Admin > View/Edit/Delete Products:
Select an existing shippable product of yours and click Edit;
On the first screen, if Shipping/Buyer's Address is not checked there, tick that box;
Click Next until you reach the Shipping Options screen;
- Weight: [Enter the per-unit weight of the product]
- Package type & Capacity: If you expect to ship every order as a single parcel containing all items ordered, select the same Package Type for all products and set Capacity at 9999;
Click Next until you can Submit to save settings;
Repeat this for all your tangible goods;
When adding new shippable products, remember to enable Shipping/Buyer's Address.
Go to Seller Admin > Cart Shipping Settings and set up the following:
Shipping Origin: select United States and enter your zipcode;
Shipping Destinations: select United States, Canada and Australia (hold down the Ctrl key on PC or Command key on Mac to select multiple countries in this list);
Define Packaging: You may wish to specify an empty Weight for the Package Type(s) you selected for your products;
Leave all other settings blank or 0.00;
Click Next to save settings and proceed to the Shipping Rules screen.
In the Existing Shipping Rules menu, select and Delete any Rules you may have saved there.
Set up your first Shipping Rule for free Domestic shipping up to 4 items:
Shipping Rate Calculator: Flat;
Shipping Amount: 0.00;
Shipping Description: FREE;
Country: United States;
Max. Items in Cart: 4;
Leave all other settings blank or 0.00;
Click Submit to save the Rule.
Next rule for Domestic shipping on 5+ items:
Shipping Rate Calculator: USPS Cheapest (applies First Class rate when available, or Priority rate otherwise);
Country: United States;
Min. Items in Cart: 5;
Leave all other settings blank or 0.00;
Click Submit to save the Rule.
Next rule for Int'l shipping:
Shipping Rate Calculator: USPS Cheapest;
Country: All Countries (this covers all your chosen Shipping Destination countries that don't have a rule of their own);
Leave all other settings blank or 0.00;
Click Submit to save the Rule.
Click Back to Admin, and you're done!
This help page explains our shipping settings in detail:
http://www.e-junkie.com/ej/help.shipping.htm