A website owner wishes to contract a developer to create a video display on the site. The developer charges a rate of $$\frac{15}{?}$ frame

to create video. The website owner wants to use a frame rate of $30$ frames per second. If the website developer wishes to have a

$39$ second video created, how much will it cost$?$

$($You do not need to include the units. You only need to enter your answer as a number.$)$