I am writing to inquire about the payment for Janet M’s services. I hired her to

I am writing to inquire about the payment for Janet M’s services. I hired her to help me with my Financial Management Reflective Paper and have already paid a partial payment of USD 16.67. The system is now asking me to pay USD 40.00, but Iam only expecting to pay USD 20.33. Coul you please clarify why the total amount is higher than expected? Thank you for your time and attention to this matter.