To give an incentive for your team to perform really well and generate great sales, offer a commission. They will feel the competition and incentive to earn more by treating more clients and selling more products. Each client that walks in for treatment will buy at least 2 products. Averagely priced at £30, this makes it £60 for one client on 1 day. Multiply this into 6 days (giving one day where the clinic is closed) and then into 48 weeks you get average yearly earnings of £17, 280.
Now if two or even four people averaged the same amount of sales, you would have quadrupled your sales in the same amount of time. Good training and sound incentives like commissions can help you achieve your sales and targets for the year.