Video Presentation created from an audio and powerpoint file

We have a powerpoint presentation file and an audio file. We need to have this turned into a video presentation. So visually it has the presentation on the screen and the audio while it is playing. It is about 25min long. You need to be able to also ensure the audio is matched to the slides. So when the speaker moves to the next slide talking, you would move the presentation to the next slide. Should be easy to tell as she is virtually reading the slides on the audio. All in English, so need to understand English well to match slides properly. Needs end product to be in an easy format for people to view. Please provide me a quote and your time to complete this. This is also a test run. As we have another 5 or so to do of these if work is done well.