I am investigating moving my fulfillment to Amazon Multi-Channel Fulfillment. Amazon offers 3 shipping options, "Standard", "Expedited", and "Priority", which Amazon defines as 3-5 day, 2 day, and 1 day, respectively (the actual times are apparently longer). Amazon does not specify the shipper -- the actual shipping method is likely some combination of Amazon and USPS or UPS. For the MCF service, they charge a fee per item that decreases from as the number of items goes from 1 to 5 and is then a flat per item rate at 5 and above. I'm trying to figure out if it is possible to customize the shipping options to:
1) Have 3 shipping options in the cart, Standard, Expedited, and Priority (or whatever I decide to name them).
2) Have a formula that calculates the shipping rate based on (i) the shipping option and (ii) the number of items in the cart. The formula for calculating the shipping charge would look something like [ Shipping Rate = Base Rate + V1 * SQRT(quantity * V2) ]. The "quantity" is the total quantity of products purchased, regardless of SKU. V1 and V2 would vary depending on the shipping method selected.
Does this sound possible at all?