Standard costs are derived from the charge rate, which serves as a helpful guide as to what your staff actual costs need to average at or be valued under.
Standard cost formula
Charge per unit / (1+(Target profit / 100)) = Standard cost per hour
Target profit = 25%
Charge rate per unit = $100
$100 / (1 + (25/100)) = $80
The target profit is defined in your financial controls. By default, Synergy sets the target profit to 25%.