Timing of Revenue Recognition on Bill$-$and$-$Hold Arrangement

On June $5,$ Quantum Corp. sold $500$ units to a manufacturer. Payment is due in $30$ days according to the normal credit arrangements with

this customer. However, the units will not be shipped to the manufacturer for $2$ to $6$ weeks due to an unexpected change in the

manufacturer's production schedule. Quantum Corp. has isolated the units in its storage facility and will ship the items when the

manufacturer can accommodate the items. If the units were shipped to the manufacturer on July $6,$ when would Quantum Corp. recognize

revenue?