Baskin-Robbins is an American multinational chain of ice cream and cake specialty shops owned by Inspire Brands. Baskin-Robbins was founded in 1945 by Burt Baskin and Irv Robbins in Glendale, California. Its headquarters are in Canton, Massachusetts, and shared with sibling brand Dunkin' Donuts. It is the world's largest chain of ice cream specialty stores, with more than 8,000 locations.
The company is known for its "31 flavors" slogan, with the idea that a customer could have a different flavor every day of any month. The logo includes a stylized "31" formed from the letters "B" and "R". The slogan came from the Carson-Roberts advertising agency (which later merged into Ogilvy & Mather) in 1953. The company has introduced more than 1,300 flavors since 1945, including the addition of vegan and non-dairy flavors in 2019.
I've tried a few things. I did one method to try to accomplish the removal of the -70 in the derivative boundary condition. It came out as below. When plotting it however it gave a solution that didn't make sense.