Graphing a "complex" formula with simple inputs

Hey everyone, I'm trying to graph a range of inputs into my payroll "model". Essentially, I'm trying to see what number of hours worked results in a weekly payment and I think a graph would be easier to compare the options rather than changing the number of hours per day and having to remember what the previous input resulted in. My model deals with overtime and doubletime per day, rough employer taxes, and so the typical way I'd approach this (creating a table with x=hours per day and then the other column being f(x) and then copied/pasted down for a range of x) doesn't seem practical.

I'm not sure how to word all this exactly, which is why a google search hasn't helped me.

In the attached example, I have 16 hour days, but I'd like my graph to show the range of 8-16 hour days with the corresponding employee take home pay (and ideally the employer cost as a separate line on the same graph). Any help would be appreciated!