Check your WaveOrtho text message usage summary stats for this month and the last 3 months
Your texting number can be found in WaveOrtho -> Settings -> Text Messaging
Average Usage Per Day
Your message count includes all outgoing and incoming messages, both text
and photo messages (SMS & MMS)
Messages, both incoming and outgoing, are billed as
individual message for every 160
characters used. This means that a message with 400 characters will be billed as 3 messages.
Your Usage count is the value used for billing
Usage Ratio is the average number of message units used per message
sent/received. A higher number means your text messages are larger than a single message. A
ratio of 2.1 means you're averaging 336 characters per message sent (160 x ratio).