Answer
The required volume of stock in US measures is $~~2~cups+1~halfcup+2~teaspoons$
Work Step by Step
We can calculate the required volume of stock in British teaspoons:
$V = (1~breakfastcup)+(1~teacup)+(6~tablespoons)+(1~dessertspoon)$
$V = (2~teacups)+(1~teacup)+(6~tablespoons)+(1~dessertspoon)$
$V = (3~teacups)+(6~tablespoons)+(1~dessertspoon)$
$V = (24~tablespoons)+(6~tablespoons)+(1~dessertspoon)$
$V = (30~tablespoons)+(1~dessertspoon)$
$V = (60~dessertspoons)+(1~dessertspoon)$
$V = 61~dessertspoons$
$V = 122~teaspoons$
Note that for liquid measures, 1 British teaspoon = 1 US teaspoon.
Therefore the required volume of stock is 122 US teaspoons.
We can express this volume in US measures:
$V = 122~teaspoons$
$V = 40~tablespoons+2~teaspoons$
$V = 5~halfcups+2~teaspoons$
$V = 2~cups+1~halfcup+2~teaspoons$
The required volume of stock in US measures is $~~2~cups+1~halfcup+2~teaspoons$
