Suppose that the manufacturer of a gas clothes dryer has found that when the unit price is p​ dollars, the revenue R​ (in dollars) is Upper R left parenthesis p right parenthesis equals negative 6 p squared plus 6 comma 000 p.R(p)=−6p2 6,000p. ​(a) At what prices p is revenue​ zero? ​(b) For what range of prices will revenue exceed ​$1 comma 200 comma 0001,200,000​? Question content area bottom Part 1 ​(a) At what prices p is revenue​ zero? The revenue equals zero when p is ​$enter your response here. ​(Use a comma to separate​ answers, but do not use commas in any individual​ numbers.)