这句话哪儿有语法错误?First,the contract number should be changed to 28

这句话哪儿有语法错误?
First,the contract number should be changed to 28KG603; Second,the amount should be USD185,000 instead of USD158,000; Third,the date of credit should be 20/11/98 instead of 30/11/98; Fourth,the quantity and amount may not very precise,so should allow 5% floating up and down ; Fifth,insert "irrevocable" before "credit".