Given:
For last month,
Profit = $22,080,
Sales = $286,900
Also,
Fixed costs = $92,680 per month
Therefore,
Revenue - (286,900 + 92680) = 22080
Revenue = $401,660
To break even, profit = 0, so that
Sales Revenue = 286,900 + 92,680 = $379,580
Answer: $379,580