Hey there!
To find perimeter, add the sides. . .
12 + 12 = 24
6 + 6 = 12
24 + 12 = 36 <------ The perimeter is 36 inches.
To find area, multiply the two sides. . .
12 x 6 = 76 <------ the area is 76 inches.
To combine the area and perimeter, add the numbers 76 and 36. . .
36 + 76 = 112 <--- the area and perimeter combined is 112 inches.
Hope this helps you.
Have a great day!