Average revenue per customer, calculated on a trailing twelve-month basis.
ChannelAdvisor defines this as:
Average revenue per customer is revenue divided by the average monthly number of customers during the period, which is calculated by taking the sum of the number of customers at the end of each month in the period and dividing by the number of months in the period.
Last reported quarter 2018 Q3 it was $46,073.00, up by 10% year-over-year from $41,748.00. From $150,492.00 in 2016 it increased by 10% to $165,521.00 in 2017.
Source: ChannelAdvisor Quarterly Results.