Tests for a good argument

For a statement to be a good argument it must pass three tests. The premises must be plausible, the premises must be more plausible than the conclusion and the argument must be valid or strong.
An example would be: At work, if by the end of the fiscal month you have sold a minimum of $10,000 in premier dog food, than you will earn an extra $100 on your next paycheck. The end of the month comes and the total sold for premier dog food was $11,257. Therefore I get an extra $100 on my next paycheck.
The premises is valid and is thus more plausible than the conclusion within the first two statements. If a certain goal amount of dog food was sold, there is an opportunity to earn extra money. By my total reaching $11,257 I clearly have passed the minimum goal and therefore deserve the extra $100 bonus. To me this example is a good argument.