There shall be paid by the condemnor in respect of each parcel of real property acquired by eminent domain or by consent under threat thereof, in addition to the fair market value of the property, a sum equal to the various expenditures actually and reasonably incurred by those with an interest or interests in said parcel in the process of evaluating the condemnor's offer to buy the same, but not to exceed a total of seven hundred fifty dollars. In the case of multiple interests in a parcel, the division of such sum shall be determined by the court or by agreement of the parties.