The booking conversion rate for mobile visitors prior to the enhancement was 6%

The booking conversion rate for mobile visitors prior to the enhancement was 6%
The new mobile visitor conversion rate is 10%
Mobile visitors are 25% of all unique visitors
We receive 100k total unique visitors per month
Average revenue per booking is $30
How much incremental annual revenue will be driven by this improvement?
If the enhancement cost us $30,000 to implement, was this a good investment?
two questions need to be answered. This is based on an ecommerce website.Pretend the business is a ecommerce