[填空题]
How many kWh of energyniz; ; ;c4hxoi2 h-be,cy3u0xsn.m fd does a 55a3(6inz 6p 0psf i4cly0-W toaster use in the morning if it is in operation fo pc04a66nis i3 (fpzylr a total of 15 min? At a cost of $9.0\,cents/kWh$, estimate how much this would add to your monthly electric energy bill if you made toast four mornings per week.
energy $\approx$ kWh
cost $\approx$ cents/mouth
