Table:
For the years ended

September 30, 2019	September 30, 2018

Amount	% of Revenue	Amount	% of Revenue

(Amounts in millions)

Customer A	$3.8	5%	$7.5	10%

Customer B	$10.2	13%	1.1	3%

Answer the following question drawing on the tabular data along with the context text, answer the question. You may include your reasoning, but be sure to finish with a JSON block exactly like {"answer": ["ANSWER"], "scale": "SCALE"} (leave "scale" empty if not applicable).

Text:
The following table lists customers from which the Company derived revenues in excess of 10% of total revenues for the years ended years ended September 30, 2019 and 2018
In addition, accounts receivable from Customer A totaled approximately $0.3 million, or 1%, and approximately $1.1 million, or 9%, of total consolidated accounts receivable as of September 30, 2019 and September 30, 2018, respectively. Accounts receivable and long term receivable from Customer B totaled approximately $7.4 million, or 36%, and approximately $0.2 million, or 2%, of total consolidated accounts receivable as of September 30, 2019 and September 30, 2018, respectively. We believe that the Company is not exposed to any significant credit risk with respect to the accounts receivable with these customers as of September 30, 2019. No other customers accounted for 10% or more of total consolidated accounts receivable as
of September 30, 2019.

Question: What is the difference in revenue earned from customer A and customer B in 2019?

10.2 - 3.8 , therefore {"answer": "6.4", "scale": "million"}