Is the cost of living in Saltillo high?

"The cost of living in Saltillo is relatively low compared to other cities in the country. The rent for a one-bedroom apartment in the city center can be found for around $400 USD per month, while outside the city center is even cheaper. Groceries in Saltillo can be fairly inexpensive, and you can find restaurants that offer meals for less than $10 USD. Transportation costs are low with public buses costing around $0.50 USD per trip," mentioned another expat when asked about moving to Saltillo, Mexico.