Stamp Dealer
Actually, I sell US postage stamps on eBay. I sell about 20 to 50 a month. That may seem low, but they sell.
Before I sell a stamp I have to know exactly what I am selling, therefore there is a process of identification and grading. Then the stamp is posted on eBay. You do not have to be a dealer to sell stamps. Collectors buy, sell and trade stamps all of the time.
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38 and 42 is 80 stamps. Twice 80 is 160 minus 8 is 152 38 plus 42 plus 152 is 232.
there would be 7 stamps in a dozen
5.52
The postage from the US for an ordinary first class letter of 1 ounce or less is 98 cents You can buy a 98-cent stamps or use any combination of stamps whose total value is 98 cents of more. 2 forever stamps plus a 10-cent stamp would work.
Let ' T ' = the number of 3-cent stamps. Furthermore, let ' F ' = the number of 5-cent stamps. T + F = 51, ===> so F = 51 - T 3T + 5F = 223 3T + 5(51-T) = 223 3T + 255 - 5T = 223 -2T = -32 T = 16 ===> so F = 35