“If payment is not received by January 15th, you will be charged a $150 penalty.”

You work in the management office of an apartment building. One of the tenants hasn't paid his rent yet for this month, and the payment is 10 days overdue. You're writing a letter to warn him to pay his rent. You explain what will happen if he doesn't pay soon:

If payment is not received by January 15th, you will be charged a $150 penalty.

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