The assembly shall assess against the benefitted parcels any costs of the improvement
that are allowable under AS 29.46.110, including without limitation costs of land
acquisition necessary for the improvement, design, engineering, administrative costs,
professional services, financing costs and interest; provided that the assessment
allocated to a parcel shall be reduced by the amount of any prepayment for that parcel
under KPB 14.31.080. Before the costs are allocated to the benefitted parcels under KPB 14.31.120, the amount of the approved borough match will be subtracted from the total cost
of the improvement.