Development cost provides a hover tip about the fact that players without 
Common Sense DLC receive another beneficial effects - Goods produced modifier.
Parameters
| Parameter | Description | Default | Status |
|---|---|---|---|
| 1 | value of the development cost bonus without percent sign | – | required |
| 2 | enables a grey background for the value | – | optional |
Examples
{{Development cost|−10}}−10% 发展度花费
{{Development cost|−10|b}}−10% 发展度花费