ask my dearest teachers

I have no answers to the questions that I have looked up in the dictionary but cannot get, so I need your help , teachers. Thank you very much.
1.The shipment should be made _____ August 9. ( can you tell me the difference between them)
a. no late than b. not later than
2.Your claim on the shortage of weight ____ to 3,980 kgs in all.
a. account b. accounts c. amounts

[Mister Micawber]

.
Please make an attempt at determining the answers yourself.

.