"We write to alert you to the Board's claims against the Arizona Senate as a result of its election equipment being rendered unusable for Arizona elections because it was compromised by the Senate's vendors, and also as a result of costs the County incurred complying with the Senate's subpoenas… In accordance with ARS. § 12-821.01, the County is wiling to settle all its claims against the Senate for a sum certain of two million, eight hundred thirty-three thousand, two hundred twenty dollars ($2,833,220.00), which is the cost to the County's taxpayers to replace the equipment that was compromised and rendered useless while in the Senate's custody and control This offer shall remain open for sixty days following the service of this Notice of Claim" writes Maricopa County Attorney Alister Adel to Arizona State Senate President Karen Fann. Included in the exhibits of the notice PDF are the cost schedule for replacing the equipment, hence invoice.
That "sixty days" part is key because Arizona state law stipulates that any plaintiff with a tortious claim against a public entity must first file the notice of claim and allow the party to answer or settle before filing a civil complaint, per KNPX political reporter Braham Reznik. So expect Maricopa to sue their asses bright and early on day 61 if Karen and her buddies don't pay up.