Custom Ultima cost $248 instead of $239

I was planning to make a ultima custom and was looking for the total cost. I have six modules, each $14.99 which brings me to $89.94 as shown on my cart. Then I added the ultima build cost $149.00. The final total cost shown somehow then jumps to $248. Yet shouldn’t it be $239 ($238.94 to be precise)?

Edit: I tried different combinations from three modules to fix modules, it turns out that $248 is the minimum cost no matter what the modules numbers are. Moreover, on the check out credit card page, it now shows the final cost is $292.97 for three modules. Is it correct?

Edit 2: I see what happens. The cost for ultima is $149 on top of the $99 regular build = $248 just for the build itself (while I thought the ultima build was $149). Then it adds the module price.

You just buy/license the modules then you can build using what ever build you want.
Read the faq of the q store if anything