Plotting issues in MC prime 2.0

I'm having trouble plotting a function in MathCad Prime 2.0. Essentially I need to plot various moments of inertia as the angle theta changes. I've tried a couple different things (still a MathCad novice) but nothing seems to work. I've gotten alot of errors saying "there are too many range vairable" and the like. I need the I_base and I_cs functions plotted. Attached is my current worksheet. Feel free to play with it and change some things. Any help would be appreciated.