幫助手開發票的小工具．
The app helps business owners in Taiwan to write business invoices. Some basic math is being done automatically to properly account for sale tax.
Features:
- two types of invoices: regular and triplicate
- tax calculator, two ways: either calculates tax markup, or reverse-calculate the pre-tax price to match a desired post-tax sale price
- automatic lookup of company name - as you enter buyer's tax id (統一編號), for the triplicate invoice, the app will try to automatically fetch buyer's name in Chinese from the public database
- automatic price notation in Chinese numerals - the invoice in Taiwan has a field that needs to be filled with Chinese numerals, and the app will generate those automatically so that it is easier to copy onto the hand-written invoice
