SOLVED: Trying to do modified per product shipping

-- HikaShop version -- : 2.6.1
-- Joomla version -- : 3.4.8

I am trying to charge $3.99 for the first item, then $2.00 per item for each additional.

Getting the $3.99 for the first product is simple enough, that works fine. The problem is with multiple items.

When I set up for multiple items and I use price per product, it charges the $3.99 base price and $2.00 for each product. So for 2 products I want to charge $5.99, but the system is charging $7.99.

Is there a way to do this?

I don't think I explained this very well. I'm not using the plugin, I don't have any values configured there. I am only using manual shipping configuration. Here is how I have it configured now:

I have another shipping method configured for 1 item that only charges $3.99 shipping. I want to charge $3.99 for the first item, then $2.00 for each additional item in the cart. Here is how it is working now -

1 item - $3.99
2 item - $7.99 (3.99 + 2x 2.00)
3 item - $9.99 (3.99 + 3x 2.00)

Here is how I want it to work
1 item - $3.99
2 item - $5.99 (3.99 + 1x 2.00)
3 item - $7.99 (3.99 + 2x 2.00)

I definitely DO NOT want to add shipping prices to the items themselves. So basically this is the formula:

Shipping - $3.99 + ((items in cart -1) x 2.00)

Does that makes sense and can it be done?

Ok, I misunderstood what you meant, but I still can't get it to work.

I got the plugin enabled so that I can set the pricing in the product itself. The results are the same as what I had before though. It still charges the correct price for 1 item, but it still charges $2 for the first item on any quantity 2 or higher.

I don't think I understand what you mean by switching to a fixed fee. If I set a fixed fee, then it's not increasing the shipping price when we add items to the cart.

Ok, after pulling my hair out I found the solution and it charges exactly what I want for every quantity. The solution is so simple.

I disabled the per product plugin, no need to set the price in each product, which is good because there are a lot of products.

In the shipping configuration I changed the price to $1.99 and the price per product to $2.00 with no minimums. Now the first product is $3.99 and each successive item is an additional $2.00.

The end result is the same, I just had to adjust the formula to fit the way Hikashop calculates the shipping.

Thanks!