After the shave three offers of $100 were made for any men willing to take the cut, with Mrs Cummings' father Bruce Allen, grandfather Ted Allen and Sam's father Derek Lawson going under the clippers.
"To have my dad and my granddad and Sam's dad all jump up and have their heads shaved was amazing. I was absolutely flawed with the support there as well."
The newly bald Mrs Cummings said she loved her bald head, particularly because there was "no maintenance" involved.
At the event on Friday, she was approached by a young man who had been on the receiving end of treatment - something which touched her and saw her trying to hold back tears.
"He and his family first hand saw the benefits of Shave for a cure and the money he has received towards helping him is quite incredible. It was really neat to be able to talk to a person who has gone through it but is on the other side and has received the benefits from what we are trying to do. "
Mrs Cummings decided seven years ago that she would shave off her hair in memory of her grandmother who died of cancer.
She started an auction this month with the highest bidder getting to shave off her hair and her Gemco Group workmates were top bidders with $3113.
They chose Sam, whose father also works for Gemco, to do the honours.
"I just want to say a huge thank you to everyone, absolutely everyone who was involved or donated or who supported me in the cause."
Every day six children and adults in New Zealand are diagnosed with a blood cancer like leukaemia, lymphoma, myeloma or a related blood condition.
Anyone wanting to support Mrs Cumming can donate online at www.shaveforacure.co.nz.