
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
Xiao Ming's mother bought 3 pounds of radishes and 2 pounds of pork ribs at the market, preparing to make radish and pork rib soup. Below is the conversation between father and mother:<br/>Mother: "Last month, the unit price of radishes was $a$ yuan per pound, and the unit price of pork ribs was 7 times more than that of radishes plus 2 yuan;<br/>Father: "Today, the newspaper said that compared to last month, the unit price of radishes has increased by 25%, and the unit price of pork ribs has increased by 20%.<br/>Please answer the following questions based on the above conversation:<br/>$(1)$ Please fill in the blanks with expressions containing $a$: The unit price of pork ribs last month was ______ yuan per pound, the unit price of radishes this month is ______ yuan per pound, and the unit price of pork ribs is ______ yuan per pound.<br/>$(2)$ Write an expression to show how much more money was spent today on buying radishes and pork ribs compared to buying the same weight of radishes and pork ribs last month (the result should be simplified).<br/>$(3)$ When $a=4$, calculate how much more money was spent today on buying radishes and pork ribs compared to buying the same weight of radishes and pork ribs last month?

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