To. (B) -
"We were pleased to receive your order of 15th April for a further supply of transistor sets, [ but as the balance of your account now stands at over USD400,000, we hope you will be able to reduce it before we grant credit for further supplies.]
We should therefore be grateful if you could send us your check for, say, half the amount you owe us. We could then arrange to supply the goods you now ask for and charge them to your account."- From. (A)
It's just an example text from a book. Why does A ask for B to 'reduce' B's account balance ?! The only thing I can guess is that B has unpaid some amount of money in the past trade with A and now that the A's company checked the credit of B, B has enough money to pay... so A asks for B to reduce the balance by paying what B has owed to A. Is that what "we hope ~ reduce it" means?