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More often than not, this causes the appearance of an "invalid number" warning. This is because the character system used on the Nuance website microscopically distinguishes between a zero and the capital letter "O." Thus, absent a strike through zero, an "O" looks like a zero and vice versa. This wreaks havoc on the user until the correct combination of zeros/Os can be typed in.
List the items you will need to pay for to complete the project. Some grants require matching funds available or volunteers complete a portion of the manual labor make sure you have that available. Explain how you will cover the costs of each aspect of the project, including which parts the grant money will cover.