More than half of the conference spending reported by the Commerce Department in the first quarter of fiscal 2012 was based on estimated and unsupported costs, according to a new inspector general report. The IG found that 65 percent or $1.1 million of the total $1.7 million in conference spending reported by Commerce was not based on actual costs for things such as meals and incidental expenses, transportation and lodging costs. This also included budgeted expenses that the department could not provide sufficient documentation for. Some bureaus said they used estimates because the actual expenses were not available at the…