About 15 pages including cover letter. They're broken out into monthly summary.
What interest rate was charged, what monthly cost was, what interest rate should have been, what monthly charge should have been, overcharge per month.
Two sets of figures, one based on the letter sent out (up to that date) and one based on when they received the acceptance back (based on that date.
Sorry, I'll elaborate, It's 15 pages in total, including the cover. The actual calculations are in two lots, up to the offer letter & up to the date of settlement [4 pages each]