Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Rank | County | Per capita\nincome | Median\nhousehold\nincome | Median\nfamily\nincome | Population | Number of\nhouseholds |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | McCone | $32,205 | $42,998 | $52,636 | 1,734 | 774 |
| 2 | Gallatin | $27,423 | $50,136 | $65,029 | 89,513 | 36,550 |
|  | United States | $27,334 | $51,914 | $62,982 | 308,745,538 | 116,716,292 |
| 3 | Stillwater | $27,168 | $57,227 | $65,438 | 9,117 | 3,796 |
| 4 | Richland | $26,888 | $52,516 | $60,236 | 9,746 | 4,167 |
| 5 | Fallon | $26,819 | $52,529 | $64,500 | 2,890 | 1,233 |
| 6 | Sheridan | $26,537 | $39,578 | $55,313 | 3,384 | 1,587 |
| 7 | Jefferson | $26,437 | $56,695 | $67,195 | 11,406 | 4,512 |
| 8 | Yellowstone | $26,152 | $48,641 | $62,380 | 147,972 | 60,672 |
| 9 | Lewis and Clark | $25,894 | $50,238 | $65,573 | 63,395 | 26,694 |
| 10 | Carbon | $24,983 | $49,010 | $59,823 | 10,078 | 4,571 |
| 11 | Daniels | $24,737 | $38,125 | $49,479 | 1,751 | 798 |
| 12 | Flathead | $24,721 | $44,998 | $53,940 | 90,928 | 37,504 |
| 13 | Park | $24,717 | $38,830 | $50,252 | 15,636 | 7,310 |
| 14 | Dawson | $24,602 | $50,752 | $63,982 | 8,966 | 3,749 |
| 15 | Missoula | $24,343 | $42,887 | $58,302 | 109,299 | 45,926 |
| 16 | Valley | $24,305 | $42,050 | $54,096 | 7,369 | 3,198 |
| 17 | Phillips | $24,227 | $36,453 | $55,362 | 4,253 | 1,819 |
| 18 | Judith Basin | $24,029 | $41,473 | $54,479 | 2,072 | 924 |
| 19 | Ravalli | $23,908 | $43,000 | $53,004 | 40,212 | 16,933 |
|  | Montana | $23,836 | $43,872 | $55,725 | 989,415 | 409,607 |
| 20 | Madison | $23,265 | $48,167 | $56,406 | 7,691 | 3,560 |
| 21 | Granite | $23,222 | $36,052 | $47,685 | 3,079 | 1,417 |
| 22 | Cascade | $22,963 | $42,389 | $53,540 | 81,327 | 33,809 |
| 23 | Sweet Grass | $22,785 | $43,723 | $56,552 | 3,651 | 1,590 |
| 24 | Wibaux | $22,579 | $40,417 | $51,354 | 1,017 | 457 |
| 25 | Garfield | $22,424 | $42,955 | $54,375 | 1,206 | 532 |
| 26 | Fergus | $22,295 | $37,607 | $48,623 | 11,586 | 5,099 |
| 27 | Deer Lodge | $21,921 | $35,310 | $51,076 | 9,298 | 4,018 |
| 28 | Custer | $21,676 | $38,913 | $49,011 | 11,699 | 5,031 |
| 29 | Powder River | $21,543 | $37,685 | $50,156 | 1,743 | 755 |
| 30 | Hill | $21,420 | $43,606 | $55,963 | 16,096 | 6,275 |
| 31 | Silver Bow | $21,357 | $37,986 | $52,288 | 34,200 | 14,932 |
| 32 | Prairie | $21,296 | $34,896 | $43,500 | 1,179 | 551 |
| 33 | Beaverhead | $21,110 | $38,264 | $53,036 | 9,246 | 4,014 |
| 34 | Petroleum | $21,008 | $36,875 | $39,107 | 494 | 225 |
| 35 | Treasure | $20,882 | $37,969 | $51,458 | 718 | 335 |
| 36 | Musselshell | $20,875 | $37,033 | $47,860 | 4,538 | 2,046 |
| 37 | Carter | $20,681 | $35,703 | $47,955 | 1,160 | 532 |
| 38 | Teton | $20,509 | $39,516 | $49,102 | 6,073 | 2,450 |
| 39 | Toole | $20,464 | $42,949 | $54,722 | 5,324 | 2,015 |
| 40 | Chouteau | $20,202 | $41,064 | $50,201 | 5,813 | 2,294 |
| 41 | Lake | $20,164 | $37,274 | $47,437 | 28,746 | 11,432 |
| 42 | Rosebud | $19,844 | $44,776 | $56,282 | 9,233 | 3,395 |
| 43 | Lincoln | $19,626 | $30,823 | $39,600 | 19,687 | 8,843 |
| 44 | Broadwater | $19,606 | $44,667 | $46,949 | 5,612 | 2,347 |
| 45 | Golden Valley | $19,319 | $35,726 | $48,750 | 884 | 363 |
| 46 | Mineral | $19,209 | $37,256 | $44,271 | 4,223 | 1,911 |
| 47 | Liberty | $19,097 | $40,212 | $44,957 | 2,339 | 822 |
| 48 | Pondera | $18,989 | $36,419 | $47,656 | 6,153 | 2,285 |
| 49 | Wheatland | $18,474 | $30,321 | $41,161 | 2,168 | 887 |
| 50 | Sanders | $18,472 | $30,622 | $37,514 | 11,413 | 5,121 |
| 51 | Powell | $17,849 | $39,851 | $45,339 | 7,027 | 2,466 |
| 52 | Roosevelt | $17,821 | $37,451 | $50,146 | 10,425 | 3,553 |
| 53 | Meagher | $17,318 | $31,577 | $40,057 | 1,891 | 806 |
| 54 | Glacier | $17,053 | $38,075 | $44,397 | 13,399 | 4,361 |
| 55 | Blaine | $16,813 | $37,034 | $40,890 | 6,491 | 2,357 |
| 56 | Big Horn | $15,066 | $36,550 | $41,985 | 12,865 | 4,004 |
Question:
what is the difference between the per capita income in richland county and in sheridan county?
Answer:
351