
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 shopping mall offers four types of food products: 40 varieties of grains, 10 varieties of vegetable oil, 30 varieties of animal-derived food products, and 20 varieties of fruits and vegetables. Now, a sample of 20 items is selected for food safety testing. If stratified sampling is used to select the sample, then the sum of the number of vegetable oil and fruit and vegetable types selected is _____

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