0.99
Most likely, minimum wages. This is a "no brainer" position which requires no college degree in order to perform, hence the lower wage structure.
It depends on the type of donut it is, but most of the donuts there contain about 15-30g of sugar per donut.
It depends on where you buy it from!
There is fiber in some doughnuts. A few websites show doughnuts as having 1 or 2 grams of fiber.