How much cat litter is sold in the US annually? (assuming your are not able to directly query store sales or anything of that nature). For fun, and to try and sharpen my mind a bit I like to find analytical questions that employers will surprise candidates with in an interview.
With these type of questions I try to break it down one component at a time. Here was my framework for this particular question.
- Households in the US (Census Bureau)
- % of Households that own cats (source for this information?)
- average amount of cats per a household (source for this information?)
- how much cat litter does average cat per year (source for this information?)
Households in US * % Households with Cats * Average amount of cats per household * Average amount of cat litter used per cat annually = estimate of total cat litter sold in US annually