Factors affecting the cost include: density of text; density of indexing; author and research references; figures, tables, diagrams; consultation of author; use of reference sources; amendments to proofs; timescale available for work; special layout .
Conversely a well spaced text with broad overviews would work out less.
Each commission will be estimated individuallybased on a proof sample or other details providing sufficient information for a quote to be given.
Negotiation is possible and budgets can often be accommodated.