Dynamic logos by their definition are adaptable and changing. The colours, typefaces or symbols might change to reflect the situation in which they are used. To keep the branding cohesive across the different iterations, there should be some consistency between each use. These characteristics make dynamic logos very versatile in their application.
Cost will depend on the size of work and how many logo need to be created for different sizes or platforms. Single logo will cost $250 and this can go up to $2000 as per the work.