Commercial for Era liquid detergent; mother comes into laundry room and says to viewer that Era is better economically than the leading liquid detergent; she shows that both can clean clothes the same way, but Era is better for pretreating motor oil stains; shot of two measuring cups, with Era being more concentrated and therefore less is needed to clean--”in fact,” she says, “a bottle of Era cleans about twice as much laundry!”; end voiceover: “switch to Era: a better detergent that does more for your money!”