I'm not sure if anyone would be interested in this file,
But I have made a small worksheet to calculate the nuyen and karma cost of buying and binding foci, including if done purely through Work for the Man/People options.
The sheet is locked without password but you should be able to insert a number into the Force cells and the rest will be calculated for you.
Let me know what you think.
https://www.dropbox.com/s/c4pxkx9v0ck20an/SR5%20TOOL%20Foci%20Cost%20Calculator.xlsx?dl=0