The educational shop is selling notebooks for $1.50 each and a ballpen at $0.5 each.  William bought five notebooks and a ballpen. How much did he spend in all?
The cost of the six notebooks was 5 x $1.50 = $7.5.
Therefore, William spent a total of $7.50 + $0.50 = $
<gadget id="calculator">7.5+0.5</gadget>
<output>8</output>
8 in all.

<result>8</result>