The price for sending a package at the post office varies by the weight of the package according to the following table:

$\begin{aligned} \text{Weight of Package (kg)} &&\text{Price (dollars)}\\ \text{Under 1 kg} &&\text{1}\\ \text{1 kg or more and under 3 kg} &&\text{1.5}\\ \text{3 kg or more and under 5 kg} &&\text{2}\\ \text{5 kg or more and under 10 kg} &&\text{2.5}\\ \text{10 kg or more} &&\text{3} \end{aligned}$

If Leonard sends a package which consists of one $0.5\text{ kg}$ pen, three $0.1\text{ kg}$ postcards, and two $0.8\text{ kg}$ booklets, how much will he have to pay at the post office?