The board of appraisers shall prepare a report of their findings, which shall be arranged in tabular form, the columns of which shall be headed as follows: Column one, “Owner of property assessed”; Column two, “Description of property assessed”; Column three, “Number of acres assessed”; Column four, “Amount of benefits assessed”; Column five, “Number of acres taken for right of way”; Column six, “Value of property taken”; Column seven, “Damages”; Column eight, “Value of improvements constructed by landowners”.  They shall also, by and with the advice of the engineer of the district, estimate the cost of works set out in the plan for reclamation, which shall include the cost of property required for rights of way, holding basins, and other works, and damages, and the value of improvements already constructed by landowners as above set forth, and the probable expense of organization and administration, as estimated by the board of commissioners, and shall tabulate the costs.  The report shall be signed by at least a majority of the appraisers, and shall be filed with the secretary of the drainage district.  The secretary of the board of commissioners shall perform all clerical work of the board of appraisers; and shall, under the advice, supervision, and direction of the attorney for the district, prepare their report.  The board of appraisers shall report to the board of commissioners the number of days each has been employed and the actual expenses incurred.  Each appraiser shall be paid a reasonable fee for his services, and necessary expenses in addition thereto.