adding data to TXT file using ASCII

Hello, Today I have script that create txt file after user create an order, The job is to add new detail from order section and user profile to our file the site have 3 group type, Wholesale, NDP and Retail each one have different shipment method and price list, I need you to add that and fix what need to be fixed, for example shipment method now give only wholesale shipment method 2 type, need to add other option as well. in the end I need to receive clean ASCII file base on clean cod in order, the "." (point) should be always in order to same line in a row like attach txt file and some more instruction I will give. there is another DOS that I try to add but we need to remove Need to have backup for original task