Whooing can only be a single call within a section. Since every unit of an asset or liability must match revenue and cost, it is not possible to put different units in one section (in the future it may be possible by adding additional attributes for each item, but it is still unknown).
Within these limitations, there are call management methods as follows.
Separate sections by currency units (sections are not interlinked as completely independent household accounts). It is divided into KRW section and dollar section, and can be managed for each unit. Also, on the section management page, you can view the total by calculating the list of all sections in one currency unit. How to set the exchange rate for a section
Going to a separate section means that revenue and expenses are also managed separately. If you are using it for travel expenses or just for storage, you can put it in the same section. Instead, the currency unit must be unified. For example, if you need to open some dollar items in the KRW section, you can multiply the number by about KRW 1000 in KRW and record the number. And you can settle the balance according to the interim exchange rate (same method as stocks), and adjust the balance with profit or loss.