Developing revenue drivers?

Can someone guide what is the best method of developing revenue drivers for FSLR (First Solar) other than Y/Y method? particularly for modules

so , as per disclosures they have given watts produced and sold.

My options would be

1.)I can take that as a volume driver and use y/y % change , identify a trend to drive it , and for price i calculate revenue per watt ( net sales from modules / GWs sold) and again Y/Y % increments

2.) until recent times they have give volume change y/y % and price change y/y %, however now they don't provide price change anymore . the volume and price change with a slight adjustment as other i could have built a bridge for the net sales yoy change %.

total sales y/y change %=volume x%+ price %+ other %(difference between y/y sales-volume - price) . but in this method i will have two variables i may have to assume for historical periods. which reduces the reliability of the data (price and other).

do i have to consider capacity utilization and net booking backlog , de bookings for developing revenues drivers?