The extract from a country's balance of payments account is shown below

Item	Imports ($ million)	Export ($)
Agricultural products	-	200
Mineral products	-	300
Consumer goods	250	-
Capital goods	400	-
Insurance	50	25
banking	75	30
Transportation	85	25
Loans	150	60

Using the table above, calculate the:

(a) balance of trade

(b) invisible trade balance

(c) balance on current account