Please Help! I am a novice excel user and I am trying to get this formula to compute and not having any luck. Is there anything glaringly obvious to anyone?

```
=IF(D4>(0.2*D3),0,IF(D4>(0.15*D3)<(0.1999*D3),0.0035,IF(D4>(0.1*D3)<(0.1499*D3),0.0054,IF(D4>(0.05*D3)<(0.0999*D3),0.0064,))))
```