Please look at the coin again, no 1902 Morgans exist with CC mintmarks, the last year was 1893.
About $27.
42cents
About $150.
"DO" isn't a mint mark. The mint mark on a silver dollar for that year is on the reverse (tails) side, just above the letters "do" in the word "dollar."
One Dollar
about $25 depending on condition and mint mark
They are still found in circulation, have no silver and are only face value
If the coin has any wear the value is for the silver, about $8.50
Sorry, but there is no such dollar. All silver dollars issued in the period 1878-1921 carried an image of the head of Miss Liberty. They're usually called "Morgan" dollars after George T. Morgan, who designed the coin. In 1902 Morgan dollars were struck at 3 mints. Coins from Philadelphia (no mint mark) and New Orleans ("O" mint mark) both range in retail value from $15 to $25 depending on condition. 1902 dollars from San Francisco ("S") average about 2.5 times the values of the other two.
$15 to $20 depending on condition and variety.
Post new question with The Mintmark please.
If the coin shows any wear, value is for the silver at about $6.00