You didn't give me any cost information to replace knobs.
Answer Hello Jeanne. AppliancePartsPros.com is a company who assist DoItYourselvers repair their own appliances. We do not offer service repair at this time and can not price repairs. We can suggest researching through your dealer or the yellow pages. Thank You.
I have a broken knob. Can you replace. Depending on cost, may replace all 5.
Answer Jeanne, Yes, you can replace and individual knob or all five if you wish 74007733 . If you are unable to remove the knob from the gas valve shaft easily, you can slip a dish cloth or small towel under the knob, twist the towel, then use the towel to pull up on the knob, carefully, and it should be a bit easier. Good Luck and Thanks