Can this shipping scheme be realized using OpenCart?

Hi everyone,

I'm trying to find out what extensions we should buy.
Our company would like to implement this particular scheme for calculating the shipping price for an order:

• Some products would have set individual shipping prices, no matter the weight (so if I set that product X has a shipping price of $5, and there are two X in the cart, the total shipping price is $10)
• For all other products, there is per-item weight-based shipping:
  • A set price for each item under 1 Kg
  • A set price for each item over 1 Kg in Area A
  • A set price for each item over 1 Kg in Area B
• --> The total price is the sum of the prices of each item

The important part is that the weight-based price has to be calculated for each item and then we sum up the individual prices.

Is there an extension or multiple extensions which would allow us to have this sort of pricing?

Well, you could use Product-Based Shipping to do this, but you'd need to add each of the under 1kg and over 1kg items to their own rate. It can't base a cost on whether an individual item is under/over a weight, only on the weight of the entire cart. (If your items are cleanly divided along category or manufacturer lines, then you could also use Category-Based Shipping or Manufacturer-Based Shipping.) So in your situation, you would set up three rates like so, plus a rate for each of the particular products with their own shipping charges:

RATE #1
Title: Shipping
Sort Order: 1
Multi Rate Calculation: Sum
Geo Zones: (all)
Products: ANY, (products under 1kg)
Rate Type: (as desired)
Cost Brackets:
- From: 0, To: 99999, Charge: 3.00

RATE #2
Title: Shipping
Sort Order: 1
Multi Rate Calculation: Sum
Geo Zones: Area A
Products: ANY, (products over 1kg)
Rate Type: (as desired)
Cost Brackets:
- From: 0, To: 99999, Charge: 4.00

RATE #3
Title: Shipping
Sort Order: 1
Multi Rate Calculation: Sum
Geo Zones: Area B
Products: ANY, (products over 1kg)
Rate Type: (as desired)
Cost Brackets:
- From: 0, To: 99999, Charge: 6.00

RATE #4
Title: Shipping
Sort Order: 1
Multi Rate Calculation: Sum
Geo Zones: (all)
Products: ANY, Product X
Rate Type: Item-Based
Cost Brackets:
- From: 0, To: 99999, Charge: 5.00, Per (#): 1

ETC.

Thank you very much for your answer, that was great.