Lauer$$s have decided to expand their retail shop by building on a vacant lot they own. The company will build a new building at an estimated cost of $$1\mathrm{.}8$ million. The firm will spend another $$400$ thousand on the parking and access roads. The land was purchased ten years ago at a cost of $$900$ thousand. Today, that land is worth $2\mathrm{.}8$ million. What is the cost of this expansion project?

a$.$

$$2\mathrm{.}2$ million

b$.$

$$3\mathrm{.}1$ million

c$.$

$$5\mathrm{.}0$ million

d$.$

$$5\mathrm{.}9$ million

e$.$

$$4\mathrm{.}6$ million