What is the answer to all of these?

What situation is an example of an observational study

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6