Meanwhile, Dr$.$ Christopher thinks that the average costs for service may be an important factor affecting service demand. To have a better understanding of the future service time demand, Dr$.$ Christopher decided to include average costs in the service time forecasting. Please utilize the information in Table $2$ to predict the service time for week $17$ if the average costs for week $17$ are predicted at $$140.$ Which factor time or average costs has more impact on service demand?