In the 9 months ended 2020-09-30, DoorDash had a net loss of $149 million on $1,916 million in revenue (see page 93). Which implies if they can raise their revenue by ~7.78% while keeping costs steady, they can break even. Given their rate of revenue/cost increases (in the same timeframe as above compared to the 9 months ended 2019-09-30, revenue grew 326% while costs grew 192%), they could very plausibly do so within the next year.