I am still getting the hang of png's so please bear with me and let me know if this is correct.
They can be resized without loss of detail so it is probably worth just including the original size ?
.. and pricing according to detail of work involved?
What are the benefits of including a zipped tiff - would the exif data be included/uploaded as it seems that png's don't retain any data
Do the zips and pngs get downloaded together?