City Council members have given Waste Management Inc. exclusive rights to the city's garbage and recycling contracts for the next three years. Collection rates will remain at $8.90 per month for homeowners, $5.50 for mobile home residents and $3.82 per cubic yard of garbage for businesses. Bills for the collection will arrive every three months. The city will continue to pick up the tab for curbside recycling at a cost of $1.57 per household every month. Garbage rates rise or fall next year if the county makes adjustments, according to the contract. "They can't arbitrarily go up," Mayor Holland Mangum said.