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Topeka ? Westar Energy is seeking a change in its transmission costs that would reduce customers’ rates by about $18 million.

In March, the Kansas Corporation Commission approved a $25 million increase to the utility’s transmission delivery system. That came a day after the Federal Energy Regulatory Commission approved a settlement between Westar and the KCC after determining the company collected too much money from customers.

The Topeka Capital-Journal reports those two decisions prompted Westar to update its transmission costs Tuesday, reducing charges to customers by $18 million.

Westar spokeswoman Gina Penzig says the when customers see the reduced costs will depend on when the KCC acts on the utility’s request. She says if the request is approved, customers in average households should save about $1.50 a month.