With only two months left in office, Kootenai County Commission Chairman Gus Johnson is in Charleston, S.C., this week for a conference on using a new computer system that keeps the county's property and tax records. Johnson and at least eight other county employees, mostly from the assessor's office, are attending the Pro Val International User Group conference at a price tag of $1,800 per person for the weeklong educational seminar in the historic coastal city.