¨-e means: Umlaut (two dots) over root vowel and add –e:

Dictionary Form: Bahnhof, ¨ -e (der)
 

Dictionary Form: Taxistand, ¨ -e (der)
 

Dictionary Form: Fuß, ¨ -e (der)
 

Dictionary Form: Traum, ¨ -e (der)
 

-s means: Add –s:

Dictionary Form: Hotel, -s (das)
 

-er means: Add -er:

Dictionary Form: Kind, -er (das)
 

Umlaut (two dots) over root vowel and add –er:

Dictionary Form: Mann, ¨ -er (der)
 

Dictionary Form: Haus, ¨ -er (das)
 

German Nouns: Ordering, Servings and Portions

For a large number of items, especially food and drink, the most useful plural form is the so-called serving or portion plural. This is formed by the appropriate numeral plus the suffix -mal to indicate how many portions are desired. The German noun stays in the singular form:
 

These forms are also used for ordering train tickets:
 

Examples of More Noun Plurals

• Aber Michael, das sind Sachen, die nur wir gerne tun. Was werden unsere Kinder machen?
• Nein, nur waschen und legen, bitte. Und nicht toupieren. Lilo, was machen unsere Männer jetzt, was meinst du?