The following revenue-based profit functions were for X Company's only two products, A and B, in 2020: Product A: PA = 0.23RA - $31,000 Product B: PB = 0.39RB - $61,000 In 2020, revenue from sales of A was $300,000, and revenue from sales of of B was $150,000. Assume the product mix in 2021 remains the same as in 2020, what must total revenue be in 2020 in order for X Company to break even [round the weighted average contribution margin rate to two decimal places]