I would call this a fixed unit price or fixed unit rate contract, under the general heading of fixed price, because the price is ...not subject to any adjustment on the basis of the contractor's cost experience in performing the contract.. FAR 16.202-1.Just my $0.02 worth. fixed rate and fixed price can be one in the same. Certainly there are contracts with fixed rates. I would usually refer to those as unit-priced items, as opposed to lump sum priced items. And there is no prohibition in including a not-to-exceed quantity of a unit-priced item.
The best way to store herbs is to wrap them in a wet paper towel and put them in a plastic bag in your fridge. My rosemary, thyme, and parsley lasted for a month and was still fresh. I recommend this method.
Hang the lavender stems upside down in a dry, dark room, with good ventilation. Dry the buds for two to three weeks or until they feel brittle and papery. To pick the dried lavender buds off the stem, hold the stem flower side down over a bowl. Wrap your hand around the stem and draw it downward to dislodge the buds. Pick off any buds remaining on the stalks by hand and place them in the bowl with the rest of the removed buds. 1  Shears.  Rubber band.