Here is the cleaned up sketch. The first had so much numbers and equations and cross outs and illegible writing, that I did a second one for the blog. This is how the pattern begins. I start with the basic measurements, and using the gauge from the swatch, I plugged the sts per inch into the pattern measurements to find the number of stitches needed to create the dimensions I want.
Thus the back has been cast on at 90 stitches, and I am starting with seed stitch for the bottom band.