Rugrats b/d cake for 2 yr old

I haven't been on in a while. Been really busy between taking care of my 19 month old grandson & preparing for this cake the last few weeks. The customer needed a cake to feed 25 people so I did 7" & 9" single layers. I cut them both in half and put icing in between to add a little height. The tree & slide are made from gum paste as well as the decorations on the cake base. The cake is covered in buttercream frosting & all the decorations on the cake are made from MMF. The customer purchased the set of Rugrats figurines for the cake. She had told me her budget was $75-$80. I know it was well worth the $80 but I ended up charging her &70. She wasn't really very specific about what she wanted & I think she was just expecting a cake w/the figurines placed on top.The design & addt'l details were my idea.