THE Airports Company South Africa (Acsa) announced on Friday that it is upgrading and expanding the shopping area and duty-free mall at Johannesburg International Airport at a cost of R210-million. The expansion is part of a R2-billion project over the next five years. Acsa said its retail division, which includes shops, car hire, outdoor advertising and car parking, had increased revenue by 27% to R127-million during the past financial year.