Calculate the slide $($or roll down$)$ on a bond with the following details:

$3$ year bond

$1$ year holding period

Bond pays a floating rate of interest of $3$ month LIBOR $+40$ basis points

A similar $2$ year bond has a floating rate of interest of $3$ month LIBOR $+30$ basis points

We expect to be able to finance the bond at $3$m LIBOR