Please prepare the sells contract promptly so that we can arrange opening the L/C in favor of your company. .改错

Please prepare the sales contract promptly so that we can arrange to open the L/C in favor of your company. 解释：原句中“sells”是一个错误的拼写，正确的单词应该是“sales”。因此，将其修改为“sales contract”即可。另外，“in favor of”前面应该加上不定式“to”构成“arrange to”，表示“安排做某事”的意思。所以，整个句子应该修改为：“Please prepare the sales contract promptly so that we can arrange to open the L/C in favor of your company.”