Issue with Memberships and staff extra price

[Valentina R]

When memberships plugin is activated, if staff has extra price, it is not added to cart or checkout.

To reproduce simply enable the memberships plugin, no need to test it with a memberships account.

Tested on 3.3.0-beta.

Reported here:https://bizzthemes.com/forums/topic/cart-price-different-than-booking-price/

[Željan Topić]

Fixed with 3.3.0