> For the complete documentation index, see [llms.txt](https://xtop-pet.gitbook.io/xtoppet-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xtop-pet.gitbook.io/xtoppet-whitepaper/factory-system/factory-upgrades.md).

# Factory Upgrades

To increase production efficiency and maximize output, factories can be upgraded. Each upgrade enhances the factory's production speed, allowing players to produce more jelly candy within the same amount of time. Upgrading a factory requires the expenditure of BXET tokens, and the amount of tokens needed increases with each level of factory upgrade. The production speed of jelly candy increases with each level, and the cost in BXET for each level varies. Below is a table of factory levels and their corresponding production speeds and upgrade costs:

| **Factory Level** | **Jelly Candy Production Speed (per hour)** | **Factory Upgrade Cost (BXET)** |
| ----------------- | ------------------------------------------- | ------------------------------- |
| Lv1               | 0.4                                         | 0                               |
| Lv2               | 0.52                                        | 104                             |
| Lv3               | 0.67                                        | 135                             |
| Lv4               | 0.87                                        | 175                             |
| Lv5               | 1.14                                        | 228                             |
| Lv6               | 1.48                                        | 297                             |
| Lv7               | 1.93                                        | 386                             |
| Lv8               | 2.50                                        | 501                             |
| Lv9               | 3.26                                        | 652                             |
| Lv10              | 4.24                                        | 848                             |
| Lv11              | 5.51                                        | 1102                            |
| Lv12              | 7.16                                        | 1433                            |
| Lv13              | 9.31                                        | 1863                            |
| Lv14              | 12.11                                       | 2423                            |
| Lv15              | 15.74                                       | 3149                            |
| Lv16              | 20.47                                       | 4049                            |
| Lv17              | 26.61                                       | 5323                            |
| Lv18              | 34.60                                       | 6920                            |
| Lv19              | 44.98                                       | 8996                            |
| Lv20              | 58.47                                       | 11694                           |