For all customers, which product has the lowest gross profit per unit for the $1/2$ cup jar?

A$.$ Cumin Ground

B$.$ Coriander seed

C$.$ Cumin Seed

D$.$ Coriander Ground

How much is the average gross profit per unit of $\frac{1}{2}$ cup jars of Cumin S$$ed for all customers?

A$.$ $$2\mathrm{.}20$

B$.$ $$3\mathrm{.}30$

C$.$ $$4\mathrm{.}20$

D$.$ $$3\mathrm{.}21$