# Using bc for math.
# Calculates sales tax.

echo -n "Please enter the amount of purchase: "
read amount
echo

echo -n "Please enter the total sales tax: "
read rate
echo

result=$( echo "
scale=2; tax=$amount*$rate/100.00;total=$amount+tax;print total" | bc )

echo "The total with sales tax is: \$ $result."