The below caselet shows the number of ruled and unruled notes sold by three different companies A, B, and C.
The ratio of the number of ruled notes sold by company A to the number of unruled notes sold by company B is 2: 3. The ratio of the number of ruled notes sold by company B to the number of unruled notes sold by company C is 2: 3. The total number of notes sold by company B and company C is 660 and 780 respectively. The number of unruled notes sold by company A is 480. The number of ruled notes sold by company C is 90 more than the number of ruled notes sold by company A.
If the average number of notes sold by companies B, C, and D is 700, and the number of ruled notes by company D is 60 more than that of unruled by company D, then find the number of unruled notes by company D.