What does each line do (explain every detail)? salesandcountry = FOREACH salesdata GENERATE (chararray)

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Question 2:

What does each line do (explain every detail)?

salesandcountry = FOREACH salesdata GENERATE (chararray) Country AS country, (int) Price AS price;

countrygroups = GROUP salesandcountry BY country;

salespercountry = FOREACH countrygroups GENERATE group as country,
SUM(salesandcountry.price) AS totalsales;

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