The Business School at Eastern College is accumulating data as a first step in the preparation of next year's budget development. One cost that is being looked at closely is administrative costs as a function of student credit hours. Data on administrative costs and credit hours for the past thirteen months are shown below:

	Administrative	Credit
Month	Costs	Hours
July	$ 129,605	281
August	82,159	52
September	226,012	1,424
October	216,192	960
November	258,364	1,361
December	184,829	1,119
January	218,798	1,374
February	244,962	1,365
March	209,739	1,092
April	192,109	1,076
May	250,123	1,420
June	170,073	355
July	128,483	269
Total	$ 2,511,448	12,148
Average	193,188	934

The controller's office has analyzed the data and has given you the results from the regression analysis:

Regression Statistics
Multiple R	0.9337190
R Square	0.871831217
Adjusted R Square	0.860179510
Standard Error	19,865.27215
Observations	13

Anova

	df	SS	MS	F	Significance F
Regression	1	29,527,853,657	29,527,853,657	74.8243308	3.08442E-06
Residual	11	4,340,919,414	394,629,037.6
Total	12	33,868,773,071

	Coefficients	Standard Error	t Stat	P-value	Lower 95%	Upper 95%	Lower 95.0%	Upper
Intercept	101,985.17690	11,896.35558	8.57280838	3.36461E-06	75,801.47477	128,168.8789	75,801.47477	128,168.8789
X Variable 1	97.5996626	11.28305995	8.650105826	3.08442E-06	72.76581509	122.433510	72.76581509	122.433510

If the controller uses regression analysis to estimate costs, the estimate of the variable portion of administrative salaries is: