
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
A certain nutritional fast food consists of: protein, fat, minerals, and carbohydrates. The percentage of fat is $5\%$, and the mass of protein is 4 times the mass of minerals. If the total mass of this fast food is $500$ grams, then:  
$(1)$ The mass of fat in the fast food is ______ grams;  
$(2)$ If the sum of the percentages of protein and carbohydrates in this fast food does not exceed $85\%$, then the maximum amount of carbohydrates it can contain is ______ grams.

Present the answer in LaTex format: \boxed{Your answer}
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