ok, well, that was less than clear in the initial post.
still need the product type column set to A or B depending on the product.
the product A rule will be set as:
Triggers:
"Number of items with a specific column value"
if the number items where "itemType" has a value of "A" is ">" a value of "0"
Calculation:
Falt Rate of "7"
the product B rule will be set as:
Triggers:
"Number of items with a specific column value"
if the number items where "itemType" has a value of "B" is ">" a value of "0"
AND
"Number of items with a specific column value"
if the number items where "itemType" has a value of "A" is "<" a value of "1"
Calculation:
Falt Rate of "0.99"