Cristo Munch operates a convenience store. It accounts for and reports GST on an accrual basis. Cristo received the following income in the June quarter, all amounts include GST where applicable. Cake sales Fresh milk sales Fruit sales Newspaper sales Sandwich sales Soft drink sales $ $ $ $ 1580 $ 600 2890 560 $ 18100 1400 REQUIRED: Calculate items G1, G2 and G3 for Cristo Munch's June quarter BAS.