Cost Battery change Smart

Hello, after our Smart Forfour 52 KW TW first registration 02/16 had expired the 2 year old connection guarantee paid by me, in March of this year a service B was performed, the starter battery after not even 30,000 km gave up the mind. Unfortunately I forgot to ask the workshop commissioned by me about the costs. You can admire the result in the file attachment. Would it be an exaggeration if I called this invoice as impudence?