One reason GUIs were initially slow to be adopted was the cost of the hardware needed to support them. How much video RAM is needed to support a $25-$line $80-$row character monochrome text screen? How much for a $1200900-$pixel $24-$bit color bitmap? What was the cost of this RAM at $1980$ prices $($$$\frac{5}{K}B)?$ How much is it now?