15 : 5 = 3$
Total cost : quantity = single cost
Answer:
I've given you steps already, do it yourself
Answer: She should budget $672.89 monthly next year for this service.
Step-by-step explanation:
Since we have given that
Amount he was able to save per month = $48.50
Total amount he spent for the year = $1254.89
Amount he saved for the year would be

Amount left from total would be

Hence, She should budget $672.89 monthly next year for this service.