darkroommike
Subscriber
J-39 is a useful Kodak datasheet:
http://www.kodak.com/global/en/professional/support/techPubs/j39/j39.pdf
It recommends for tubes minimum solution volumes of 110 ml/ft2.
Which works out to 61ml per 8x10.
With respect to trays, it says:
Solution Capacity
You can reuse the chemicals without increasing the time in the developer for subsequent processes. The recommended number of 8 x 10-inch (20.3 x 25.4 cm) prints is 15 per quart (946 mL) or 16 per litre (33.8 fl oz). In some noncritical applications, you may be able to process up to 40 prints. However, do not use developer that has been in an open tray for more than 4 hours.
Matt that link is permanently gone, thank you very much Alaris! But this one is still working http://imaging.kodakalaris.com/sites/prod/files/files/resources/j39.pdf I'd recommend every one download the pdf to your own computer