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our customer wants to buy a new printer. Use Salesforce CPQ to make sure they get the printer and all the supporting products they need, such as toner and paper. 

Before You Start
For this module, you can’t use a standard Developer Edition org or Trailhead Playground. You must sign up for a CPQ-enabled Developer Edition org. Follow the instructions in this unit to sign up and connect the org to Trailhead.
Challenge Requirements
On the Printer for Back Office opportunity for Edge Communications, edit lines for quote Q-00001
Add the Laser Printer bundle and select all four options
Save the quote lines

can any one help with this module as i am not finding the Quote tab and also not able to do the above steps in th module also
thanks in advance 
chethan

If all digits of phone number have same value (example 111-111-1111, 222-222-2222, etc.) then the record should not be created or saved.