I had the thought that the columns served different levels of literacy - that there is a hierarchy of competence in the columns themselves, or at least that each column could be assigned to a different person for action.
For example, the purpose of the columns containing sums could be the assignment to an individual (or eventual role) which is responsible exclusively for the paying-out of the sums indicated - whereas the prior columns were to be used by roles responsible for setting the amounts to be paid, and a role perhaps for assaying the land/works.
Each column could be for an individual role, and thus the table indicates not only figures and amounts, but also organizational structure.
If one flows from left to right, one can see different identities involved in filling in the cells, eventually terminating in the actual recipients of the funds being distributed.
For example, the purpose of the columns containing sums could be the assignment to an individual (or eventual role) which is responsible exclusively for the paying-out of the sums indicated - whereas the prior columns were to be used by roles responsible for setting the amounts to be paid, and a role perhaps for assaying the land/works.
Each column could be for an individual role, and thus the table indicates not only figures and amounts, but also organizational structure.
If one flows from left to right, one can see different identities involved in filling in the cells, eventually terminating in the actual recipients of the funds being distributed.