Answer:
Bank will hold Mary accountable supported the deceitful use of the cardboard is $500
Note: Bank can’t make Mary answerable for the complete stolen amount from her ATM, as she conversant the bank at intervals every week when the cardboard was stolen, during these circumstance if the bank is informed about the stolen ATM directly the client is accountable for $50 in losses, whereas if they inform when three days quantity raise to $500 in losses.