
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
Juan has expanded his stamp collection to include stamps from four countries: Italy and Germany (Europe), and Colombia and Argentina (South America). The prices he paid are: Italy and Germany, $7$ cents each, Colombia $3$ cents each, and Argentina $6$ cents each. The number of stamps from each decade is listed below:
- 1950s: Italy 5, Germany 8, Colombia 7, Argentina 4
- 1960s: Italy 9, Germany 6, Colombia 6, Argentina 8
- 1970s: Italy 10, Germany 12, Colombia 12, Argentina 10
- 1980s: Italy 11, Germany 9, Colombia 15, Argentina 9
Calculate the total cost of his South American stamps issued before the 1980s in dollars and cents.

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