According to a projection made in January $2016,$ for each of the

three years following $2015,$ annual sales would increase by an amount

equal to $\frac{1}{2}$ of the increase in annual sales from $2014$ to $2015.$

According to this projection, approximately what would annual sales

be for the year $2018?$

$$2,200$ million

$$2,425$ million

$$3,450$ million

$$4,050$ million

$$4,875$ million