Meaning: The rules about getting money back are just and sensible.
Choice of Words: Refund is money given back. Policy is a set of rules. Fair means just. Reasonable means sensible.
Meaning: This also means that the rules about getting your money back are fair and make sense.
Choice of Words: Money-back is another way to say refund. Rules are the same as policy. Okay is another way to say reasonable.
Meaning: This is a simpler way to say that the rules about getting your money back are fair and make sense.
Choice of Words: Getting is another way to say refund. Makes sense is another way to say reasonable.