The Brady Bunch S05 E07 Marcia Gets Creamed

"Marcia, Marcia, Marcia!"

Marcia's got a new job working after school at a ice cream parlor. With both school and work, Marcia has little time for her boyfriend who, fed up comes into the parlor with another girl. Meanwhile, Marcia suggests Peter for a job but when he goofs off she is the one who fires him.