I have an old chart mostly faded out, published by then Emily W. Brown, Assistant agent dealing with food and nutrition. Chart contains EGG WEIGHT PER DOZEN, beginning with Jumbo and down to PeeWee. It also provides other information with some formulas for determining price. Unfortunately, my document is too faded out be able to read all the extenuating information. Is there a current document available that would supply the same information as I have a grandchild who is currently pursuing egg production? Thank you.