Ameren-Missouri has filed an application with the Missouri Public Service Commission which could cost their consumers a little more each month. The power company is seeking authority to adjust what’s known as the Energy Efficiency Investment Charge that appears on monthly bills. The charge is reflected as a separate line-item on customer bills to encourage utility companies to implement demand-side and energy efficient programs. What it would mean for the typical residential customer is an increase from about 55-cents per month to about $4.77 per month effective at the end of May. Anyone wishing to offer input on the request by Ameren can file with the PSC. The deadline to do so is April 12th.