TY CONF TI RESEARCH AND DEVELOPMENT OF SALES FORECAST MODELS BASED ON CORRELATION AND REGRESSION KW Income forecasting KW economic and mathematical approaches KW correlation and regression analysis JO CHALLENGING ISSUES IN SYSTEMS MODELING AND PROCESSES AU Petrov, B.Y. AU Antsiferova, V.I. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov