Choosing a name gives you one table; leaving it unset gives you a table for every salesperson, one after another. The two views are otherwise the same, except that the single-person view heads the third column SERVICE SOLD and the all-people view heads it Package Name. Both mean the service that was sold.
Above each table, Sales Person, Employee Number, Email and Mobile Phone are the details ARM holds for the person that table belongs to. They are not filters.
Each line shows the FINALIZED DATE and INVOICE NO. the commission came from, the SERVICE SOLD with its price in the name, the TOTAL AMOUNT that service came to on the invoice, and the TOTAL PART and TOTAL LABOR that amount is made of — parts after any premium charge and discount, labor after any discount. Then come the two commission groups, each with a PART, a LABOR and a TOTAL column, and a GRAND TOTAL at the end.
TECHNICIAN COMMISSION is what the person earned for doing the work, as either the top or the bottom technician on the job. SALES COMMISSION is what they earned for selling it. GRAND TOTAL adds the two together. A line where somebody both sold the job and worked on it carries figures under both headings; a line where they only did one carries zeros under the other.
A service only appears if the person earned commission on it. Work they did that paid no commission is left off entirely, so this is a commission report and not a record of everything they touched.
The row at the foot of each table is the totals row, though it repeats the column headings rather than saying "Total": the three headings on the left stay as words and every money column beneath carries its sum for the period.
Both printouts carry the same heading, so label them as you save them or you will not tell one from the other later. The ADD TO FAVORITES switch beside the report title saves a shortcut to the report under your favourites in the main Reports menu.