21.   Shipping fees can vary from catalog to catalog.

22.   The fee would vary according to how much traffic a development generated.

23.   The fee varies with the amount you owe.

24.   The fees vary depending on the complexity of the document but can be paid either piecemeal or by subscription.

25.   The fees vary.

26.   The fee may vary over the life of the contract to reflect the profitability of the field.

27.   The fee usually varies based on the age or gender of the patient -- not how healthy they are, the study said.

28.   The fees may vary during the life of the contract.

29.   The fees will vary based on the amount of assets and the discretion of the broker involved.

30.   The fees may vary during the life of the contract and are supposed to cover both capital investment and profit margins for the investors.