Can you explain to me "fixed USD/month" $/month" and "marginal USD/kWh"? $/kWh"? Where I can enter the cost of 1 kWh of electricity?

Can can you explain to me "fixed $/month" 'fixed $/month' and "marginal $/kWh"? Where 'marginal $/kwh'. where I can enter the cost 1Kwh of 1 kWh of electricity?electricity

can you explain to me 'fixed $/month' and 'marginal $/kwh'. where I can enter the cost 1Kwh of electricity