The management of Discount Furniture, a chain of discount furniture stores in the Northeast, designed an incentive plan for salespeople. To evaluate this innovative plan, 12 salespeople were selected at random, and their weekly incomes before and after the plan were recorded.

Salesperson	Before	After
1	$300	$360
2	290	285
3	562	475
4	450	510
5	310	450
6	402	429
7	625	631
8	560	540
9	750	775
10	431	439
11	506	625
12	412	519

Was there a significant increase in the typical salesperson's weekly income due to the innovative incentive plan? Use the .10 significance level.

Show the steps of calculations (Steps in Hypothesis Testing)