Table:
|  | Fiscal Years Ended September |  |
| --- | --- | --- |
|  | 2019 | 2018 |
| Sales (including excise taxes of $370.2 million and $368.4 million, | $1,392,388,157 | $1,322,306,658 |
| Cost of sales | 1,308,364,726 | 1,245,375,460 |
| Gross profit | 84,023,431 | 76,931,198 |
| Selling, general and administrative expenses | 72,182,883 | 66,781,234 |
| Depreciation and amortization | 2,617,591 | 2,318,146 |
| Impairment charges | 2,873,269 | 1,912,877 |
|  | 77,673,743 | 71,012,257 |
| Operating income | 6,349,688 | 5,918,941 |
| Other expense (income): |  |  |
| Interest expense | 1,598,864 | 1,194,373 |
| Other (income), net | (61,119) | (54,042) |
|  | 1,537,745 | 1,140,331 |
| Income from operations before income taxes | 4,811,943 | 4,778,610 |
| Income tax expense | 1,609,000 | 1,164,000 |
| Net income available to common shareholders | $ 3,202,943 | $  3,614,610 |
| Basic earnings per share available to common shareholders | $ 5.36 | $  5.47 |
| Diluted earnings per share available to common shareholders | $ 5.25 | $  5.38 |
| Basic weighted average shares outstanding | 597,961 | 660,925 |
| Diluted weighted average shares outstanding | 609,836 | 672,449 |
| Dividends declared and paid per common share | $ 1.00 | $  1.00 |
Paragraphs:
CONSOLIDATED STATEMENTS OF OPERATIONS
The accompanying notes are an integral part of these consolidated financial statements.
Question:
What is the percentage change in the company's cost of sales between the fiscal years ended September 2018 and 2019?
Answer: (1308364726 - 1245375460)/1245375460  = 5.06