on question chapter 5 probl 46P, there is a regression answer, but I was wondering how this was calculated with using what overhead costs and deliveries? the question states

Your company provides a variety of delivery services. Management wants to know the volume of a particular delivery that would generate $10,000 per month in operating profits before taxes. The company charges $20 per delivery.

The controllers office has estimated overhead costs at $9,000 per month for fixed costs and $12 per delivery for variable costs. You believe that the company should use regression analysis. Your analysis shows the results to be:

Monthly overhead = $26,501 + $10.70 per delivery

Your estimate was based on the following data:

Month	Overhead Costs	Number of Deliveries
1	$142,860	11,430
2	$ 151,890	12,180
3	$192,600	15,660
4	$141,030	11,250
5	$203,490	12,780
6	$180,630	14,730
7	$159,630	12,510
8	$183,990	15,060
9	$194,430	15,450
10	$150,120	11,970
11	$154,080	12,630
12	$184,800	15,300
13	$183,120	14,580

so the regression results were

Multiple R	0.9921
R Square	0.9843
Adjusted R Square	0.9827
Standard Error	2635.7
Observations	12
	Coefficients
Intercept	$9776.56
Number of deliveries	$11.69 so what was calculated to get the regression results?