Final answer:
On account means that the payment for the installation is deferred and will be made at a later date.
Step-by-step explanation:
'On account' means that the payment for the installation is deferred and will be made at a later date. Instead of making an immediate cash payment, the customer will owe the amount to Foreman Electric and will need to pay it off in the future. This is a way for customers to receive services now and pay for them later.