std_rev   = revenue.std()
var_rev   = revenue.var()
range_rev = revenue.max() - revenue.min()
iqr_rev   = revenue.quantile(0.75) - revenue.quantile(0.25)

print(f"Std deviation: ${std_rev:,.0f}")
print(f"Variance:      ${var_rev:,.0f}")
print(f"Range:         ${range_rev:,.0f}")
print(f"IQR:           ${iqr_rev:,.0f}")