Basic Excel: multi-variable linear regression + categorical variable

Basic Excel operations - https://hubertpun.com​ Multi-variable linear regression with categorical variable (we need to convert those to "dummy" variable) Dependent variable: Column A - Housing value Independent variables: Column B - Sq Ft of the house Column C - Location (either Masonville, Downtown or campus) How much would a 2000SqFt house located at downtown worth?