If it is necessary to use modern weight units, here are two ways of doing it. Alternate translation: "fifty pieces of silver, each of which weighs ten grams" or "five hundred grams of silver" (See: [[rc://en/ta/man/translate/translate-bweight]])
There were shekels of different weights. This is the one that people had to use in the sanctuary of the sacred tent. It weighed about 11 grams. Alternate translation: "Use the kind of shekel that is used in the sanctuary" or "When you weigh the silver, use the weight that is used in the sanctuary" (See: [[rc://en/ta/man/translate/translate-bweight]])