5. Among the three-digit numbers whose digits sum to 10, the numbers where the hundreds digit is no less than 3 and the units digit is no less than 2 total $\qquad$.

将上面的文本翻译成英文，请保留源文本的换行和格式，直接输出翻译结果。 

Note: The blank space represented by $\qquad$ is kept as is in the translation.
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