It is calculated by dividing the number of customers who actually purchase something from a salesperson by the number of customers greeted by that salesperson. Average sale is the average amount customers buy from a particular salesperson. It is calculated by dividing the sales volume written by a salesperson by the number of customers who actually purchase something from that salesperson. In most stores both number of sales and total sales volume are tracked by the office. This means that average sale is based on information that is not typically subject to lapses in record keeping, errors, or deliberate manipulation.
Average sale is, therefore, the most valid of all performance measures.
Finally fabric protection close ratio can be calculated by dividing the number of upholstered items treated by the number of upholstered items sold. Numbers should be collected and entered into a computer on a daily basis. Manually, this can be a big job, but I've never met a retailer who did this that was not successful. Fortunately computers have done a great deal to simplify the process. A simple spreadsheet program can typically handle the calculations you need to make.