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The table below shows the cost information for a firm in a perfectly competitive industry.
Up to what quantity is the spreading effect stronger than the diminishing returns effect?
| Q | FC | VC | TC | MC | AFC | AVC | ATC |
| 0 | 250 | 250 | |||||
| 1 | 250 | 20 | 270 | 20 | 250.0 | 20.0 | 270.0 |
| 2 | 250 | 38 | 288 | 18 | 125.0 | 19.0 | 144.0 |
| 3 | 250 | 54 | 304 | 16 | 83.3 | 18.0 | 101.3 |
| 4 | 250 | 71 | 321 | 17 | 62.5 | 17.8 | 80.3 |
| 5 | 250 | 89 | 339 | 18 | 50.0 | 17.8 | 67.8 |
| 6 | 250 | 109 | 359 | 20 | 41.7 | 18.2 | 59.8 |
| 7 | 250 | 131 | 381 | 22 | 35.7 | 18.7 | 54.4 |
| 8 | 250 | 155 | 405 | 24 | 31.3 | 19.4 | 50.6 |
| 9 | 250 | 181 | 431 | 26 | 27.8 | 20.1 | 47.9 |
| 10 | 250 | 209 | 459 | 28 | 25.0 | 20.9 | 45.9 |
| 11 | 250 | 239 | 489 | 30 | 22.7 | 21.7 | 44.5 |
| 12 | 250 | 271 | 521 | 32 | 20.8 | 22.6 | 43.4 |
| 13 | 250 | 305 | 555 | 34 | 19.2 | 23.5 | 42.7 |
| 14 | 250 | 341 | 591 | 36 | 17.9 | 24.4 | 42.2 |
| 15 | 250 | 379 | 629 | 38 | 16.7 | 25.3 | 41.9 |
| 16 | 250 | 419 | 669 | 40 | 15.6 | 26.2 | 41.8 |
| 17 | 250 | 461 | 711 | 42 | 14.7 | 27.1 | 41.8 |
| 18 | 250 | 505 | 755 | 44 | 13.9 | 28.1 | 41.9 |
| 19 | 250 | 551 | 801 | 46 | 13.2 | 29.0 | 42.2 |
| 20 | 250 | 599 | 849 | 48 | 12.5 | 30.0 | 42.5 |