Here's a breakdown of the formula:

* [Cu(NH₃)₄] represents the complex ion:

* Cu stands for copper.

* (NH₃)₄ indicates four ammonia (NH₃) ligands coordinated to the copper ion.

* [ ] brackets enclose the complex ion.

* SO₄ represents the sulfate anion.

The overall charge of the complex ion is +2, and the sulfate anion has a charge of -2. These charges balance out, resulting in a neutral compound.