The quality control manager of a cookie company is inspecting a batch of chocolate-chip cookies that has just been baked. If the production process is in control, the mean number of chip parts per cookie is 9.0. How many cookies in a batch of 100 should the manager expect to discard if the company policy requires that all chocolate-chip cookies sold have at least four chocolate-chip parts?

The manager should expect to discard _______________cookies.(Round to one decimal place as needed.)