Based on the clue 'a 1 ounce first class letter costs this much to ma...', what is the answer?

Based on the clue 'a 1 followed by 9 zeroes is this term in the us th...', what is the answer? Based on the clue 'a 1 horse carriage on springs or a device that may...', what is the answer? Based on the clue 'a 1 humped cow milking lady', what is the answer? Based on the clue 'a 1 on the mercalli scale or below a 3 on the rich...', what is the answer? What is associated with: a 1 pound tin of premium sevruga this can go for more than 2000? Based on the clue 'a 10 cent small green citrus fruit', what is the answer? What is referred to by 'a 10 dollar bill'? Based on the clue 'a 10 letter word for a crotchety old miser not a c...', what is the answer?