What would you charge for a cake like these for 50-60 people?
No one has answered because pricing is soooo hard. It depends a lot on where you are, what you want to earn as an hourly wage and other factors. Have you tried searching other pricing threads? There often is a lot of information contained in those.
I would start at 150 and up. Depending if they want a really detailed cake,the type of filling/ frosting they want. Also how skilled you are. Calling around your local bakery's gives you a good idea about pricing.
$4 to $6 a serving yeah like $5 per so $300 for 60 servings not to mention copyright issues....
Ditto to K8memphis on $4-$6+ per serving ($300) --DEPENDING ON GEOGRAPHIC LOCATION/COUNTRY/SKILL LEVEL. Is that your cake or a photo for 'inspiration'? Have you successfully done horizontal stripes on a cake?