Hello! 

Im doing this order for this weekend. It’s 9x13 2 tier, chocolate buttercream filling and rest plain buttercream. The Xbox I made out of the cake and going to cover in buttercream. Just wondering if I’m charging correctly? Photo is attached 

I would easily charge 80 to 100. If not more.

I charged $70. It is my first professional order so I was kind of anxious to get the order under my belt. But going through it I wished I charged a little more. 

I get that. I was the same way starting out :). I usually charge 60 for my single layer half sheets so 70 isnt bad for a 2 layer half sheet for you just starting out. Don't sell yourself short tho :).

Just as information that is not a '2 tier' but '2 layer' .  A 'tier' is made up of a 2 layer cake - usually 4" tall and that is what you made here.  Pricing has soooo many point to consider..... location, cost of ingredients, including packaging, and much more.   Where I am it would cost about $100-150.  What did you end up charging?