The Brandnew platform has separate guide prices per social network for each creator.
Each guide price is calculated using an algorithm which takes into account different variables such as audience size, location and social channel.
It is important to note that these estimated prices per post are just a guide and may not reflect the price charged by a creator for a specific campaign. Some creators tend to charge less for package bookings, while many are working with agents who will charge more than the guide price etc.
The engagement rate is not taken into account for the guide price, however it is clearly displayed on each creator card, so you can take it into account when deciding on payout offers for creators.