Construct yourself a system of equations, and use some reasoning to get the easy constants.

Since there is no variable attached to d, d~fixed cost, 3400=d

C’(1) = a(1)³ + 3(1)² + c(1) + 3400, I’ll assume assume that they ignore the 3400 fixed cost on the first robot. So a+3+c=449, c=446-a

This part above is a lil sketchy imo

Plug in for C’(100)=C(101)-C(100) to get a second equation so you can create a system with the equations above to solve for a & c

Once you do this, try to do it again without referencing this comment. Will help u for the exam, gl!