$11.$ A retail store paid a wholesale price of $$1,100$ for a collection of knives to sell in the front display case.

On April $1,$ the collection was marked up $30\%$ based on the cost.

On May $30,$ the collection was marked down $15\%$ for a special promotion.

On June $15,$ the collection was marked up $20\%.$

On July $4,$ the collection was marked down $25\%$ for a holiday sale.

What was the final selling price of the collection?