Using the same three 6 volt, 3.0 amp panels as above, the total output of the panels, when connected together in parallel, the voltage output would remain the same at 6 volts, but the amperage would increase to 9.0 amps (3 + 3 + 3), or 54 watts.
A monthly salary is the amount of pay you receive every month for doing your job. This also implies that you will be paid monthly, though it may not be the case. You can calculate a monthly salary even if you are paid biweekly or semi-monthly.
1 It is less than half the average salary of the UK and the United States, where average monthly earnings are just over $3,000 a month, or around $37,000 a year.  It is twice the average salary of Bulgaria, and the same as the average salary in Poland.