Advanced Shipping Price Rules - Shipping Cost on Total Cart Qty

This rule is used to apply gradually increasing, decreasing or stable flat rate shipping rate to a particular range of total cart quantity.
In this, you have to mention the minimum total cart quantity , maximum total cart quantity and the amount which will be added or subtracted per item. To keep the flat rate shipping cost stable throughout the range you’ve created, keep the fee amount zero.
How it works:
Let’s say you have mentioned minimum quantity as ‘x’ and maximum quantity as ‘x+12’. So, it has created a range of 12 items in the overall cart. 
Now, to increase the amount for shipping for this range per added item count, keep the fee amount positive. To decrease the amount with increasing items, keep it negative. 
The fee amount will be added to the base flat rate shipping fee amount, which you’ve filled in the Fee section of the main form (Shipping Fee configuration) of this method. 
So, if you add $1, then the customers will be charged base fee + $1 for the x items while base fee + $5 for x+4 items.
Example:
Charge the customer with $10+ if s/he buys 10-20 items, increasing shipping fee by 1% per item

Advanced Shipping Price Rules - Shipping Cost on Total Cart Qty

Advanced Shipping Rules - Cost on Total Cart Quantity

A simple setup is to have a base cost for a product, and then add the price per quantity on the Cart page. By using this feature, you can easily set this up. 

As an example given below, where the base cost of a product is $3, and there are three different rules that help to calculate the extra cost per quantity.

1. Shipping Discount on Specific Total Cart Quantity: (Based on discount (minus) -1 = Qty between 1 to 4)

If you want to add a discount to specific Cart quantity this rule is helpful. 

For example, as shown in the above settings:- I have applied a rule, if Cart Qty is between 1 and 4, Fee Amount is -1

Let’s see on Cart Page:-

The Base cost is $3 always as given at the top of the basic settings.  And the discount is -1 on shipping charges. Thus, the total shipping charges would be $2.

2. Quantity based shipping charge on Cart Subtotal - Based on a percentage (5%) = Qty between 5 to 10

If you want to add charges in Percentage on Cart Subtotal for a specific Cart quantity this rule is helpful. 

For example, as shown in the above settings:- I have applied a rule, if Cart Qty is between 5 and 10, Fee Amount is 5% on Cart Subtotal.

Let’s see on Cart Page: 

The Base cost is $3 always as given at the top of the settings.  And charges applied 5% on the total cart. Thus, the total shipping charges would be $16.50

Calculation: 

Cart Subtotal = $270 * 5% = 13.50
+
Base Charges = $3

Shipping = $3 + $13.5 = $16.50

3. Quantity based shipping charge on Cart Subtotal - Based on fee amount +4 = Qty between 11 to 20

If you want to add charges an amount on Cart Subtotal for a specific Cart quantity this rule is helpful. For example, as shown in the above settings:- I have applied a rule, if Cart Qty is between 11 and 20, Fee Amount is $4.

Let’s see on Cart Page:-

The Base cost is $3 always as given at the top of the settings and charges applied $4. Thus, the total shipping charges would be $7