Row$-$crop farmers throughout the South are taking a liking to catfish. Rising prices for catfish, combined with falling feed prices, have made the lure of catfish farming irresistible. Crop farmers are building ponds, buying aeration equipment, and breeding catfish in record numbers. Production has doubled in the last $15$ yearsto $340$ million pounds this yearand looks to keep increasing as farmers shift from row crops to catfish.Steve Hollingsworth, a Greensboro, Alabama, farmer, now has $10$ ponds, each holding about $100,000$ fish. He spends $$18,000$ a week on feed for the $1$ million fish in his ponds. But he says the business is good; he takes in about $$60,000$ a week in sales. Crop farmers in Alabama, Mississippi, Arkansas, and Louisiana are taking the bait.Source: Media reports, $1993\mathrm{.}1.$According to Front Page Economics The Lure of Catfish,

How many fish did farmer Hollingsworth have in inventory?

If each of his fish weighed $3$ pounds, what percent of the market did he have?