That looks like a nice quarterly job. My initial question is can you use the WFP on the exterior? That should speed up the job considerably. Do you have the tools to finish the job or would you need to buy them?
A general rule of thumb would be take your established ground level per pane pricing and increase 25% per floor level. I would consider that 2 floor levels. Unless you perform hours of pole work per day your neck is going to be sore after the initial clean. Has this glass been maintained or would you be perform an initial deep clean on the first service? If so, then I would increase the initial clean 25-50% to offset the extra time needed to bring the glass back. Let us know your status and progress on this bid.