Is this conditional sentence correct?

[donnach]

I just sent this to a potential employer and I am second guessing myself about it's grammatical correctness:

If it would make it easier for you, I could park my car and run up to the Writing Center for the parking permit.

My recent learning about conditionals leads me to believe that it's the speaker's choice when it comes to using could or would vs, can or will.

And I believe "would" is okay, but what about could? (I'm working my way through an informative 30-page .pdf file but really need advice about this issue now, before my interview, which will include two hours of tests.)

Can I mix them, by the way? Can I use will, then could? or would then can?

Thanks!

[5jj]

If it would make it easier for you, I could park my car and run up to the Writing Center for the parking permit.

That is fine.

And I believe "would" is okay, but what about could? Fine

Can I mix them, by the way? Can I use will, then could? Not really.

or would then can? Not really.

People do mix tenses in conversation, but 'would...could' and 'will...can' are the best combinations for your sentence.