The owner of a company wanted to investigate the relationship between weekly revenue ($000) and weekly advertising expenditure ($). She took a random sample of different weeks and recorded the corresponding revenue and advertising expenditure for each week selected. Excel was then used to create the following regression output:

SUMMARY OUTPUT
Regression Statistics
Multiple R	0.60000
R Square	0.36000
Observations	18

	Coefficients	Standard Error
Intercept	24.04086	0.50766
Advertising Expenditure	4.08809	0.03546

For each extra dollar spent on advertising per week, how much is weekly revenue estimated to increase by?

Please give your answer correctly rounded to two decimal places.