Bleach III will keep almost forever before use. The fix will last for a few months before use. These are both after dilution to working strength. For developer quantities, use the amount specified by your tank manufacturer for each roll size and number of rolls.

Their developer comes packed in 4 containers with instructions. Use them to make 1 Liter of working strength developer. The kit includes starter in one of the 4 containers of developer concentrates.

PE