Perform the indicated operations and simplify the expression. 
Definitions:
Checks
Financial instruments that order a bank to pay a specific amount of money from the writer's bank account to the person or entity in whose name the check has been issued.
Bank
A financial institution licensed to receive deposits, offer loans, and provide other financial services to its customers.
Collection Float
The time period between when a payment is made by a customer and when the funds become available to the recipient.
Cheques
Financial instruments that instruct a bank to pay a specific amount of money from a person's account to another individual or entity.
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