Numbers 7:86

The golden spoons were twelve, full of incense ,.... Which points at the use those spoons or cups were of, namely, to carry incense in them, such as were used on the day of atonement F12 Misn. Yoma, c. 4, 4. & 5, 1. :

weighing ten shekels apiece, after the shekel of the sanctuary ; See Gill on Numbers 7:14 ,

all the gold of the spoons was twenty shekels ; which amounted to forty nine ounces, five drachms, scruples, and eight gains, worth about seventy five pounds of our money.