Cajan Ham - Cost, Profit, Break Even Graph

Cajan Ham - Cost, Profit, Break Even Graph
The above (rough) graph shows, in a picture form, marginal cost and break-even information about the production and sale of a single product.
A ?
B ?
C 500 units - the current sales this year
D 300 units
E 100 units - the forecast sales next year
F ?
G £300,000
H £100,000
REQUIRED
Explain the point indicated by A on the graph.
Explain the distance indicated by B on the graph.
Explain the distance indicated by F on the graph.