Cost for buying 5 units of brand S = 5 x GH₵ 3,000.00
Cost for buying 5 units of brand S = GH₵ 15,000.00
Cost for 5 units of brand T = 5 x GH₵ 4,000.00
Cost for 5 units of brand T = GH₵ 20,000.00
Amount saved = Cost for buying 5 units of brand T - Cost for buying 5 units of brand S
Amount saved = GH₵ 20,000 - GH₵ 15,000
Amount saved = GH₵ 5,000.00