Archibald McIntyre died on June 18, 1904. He was 56 years old when he died and he was a native of Scotland. A = the alphanumeric value of the last letter of the town/city he came from in Scotland plus 4.
On the same tombstone for Archibald McIntyre there are two words on the last line. B = the total the number of letters minus 1.
Flora McIntyre was the wife of Alexander McIntyre. C = the digit of the day of her death minus 1.
Malcolm D. McIntyre had a wife. D = the second digit of the years she was when she died plus 1.
At the cemetery gate is the fire address, 5 digits. E = the total of these digits divided by 2.
Sarah McIntyre died on April 10, 1865. F = the numeric value of the month her husband died plus 2.
To confirm if you have your calculations correct the numbers should add up to 39.