A firm is selling two products$-$chairs and bar stools$-$each at $$55$ per unit. Chairs have a variable cost of $$25,$ and bar stools $$20.$ Fixed cost for the firm is $$21,000.$

a$.$ If the sales mix is $1$:$1($one chair sold for every bar stool sold$),$ what is the break$-$even point in dollars of sales? In units of chairs and bar stools? $($Round your unit answers to a whole number before calculating the breakeven point and round the break$-$even point to the nearest whole number.$)$