Spend Analytics Vs Biostatistics in India



Can someone help me with the scope of spend analytics in India and what sort of analysis is done in it.Does spend analysis involve any sort of statistical modeling and what other statistical techniques are involved.

I have experience in doing statistical analysis and building models for
health related data and also did Diploma in Bio-statistics. Now i am
getting an opportunity in spend analytic , but I don’t know anything
about spend analysis.

Should i change my domain and switch to spend analytics?