Devices between different subnet cannot ping to devices in another subnet $($For example devices in $/26$ cannot ping to devices in $/27)$ Please note that :

$1.$ I already provide sub interfaces in router$1$ for sales & it department and set that as default gateway for every devices in respective subnet.

$2.$ I configure all switch with the "switchport trunk allowed all vlan" command

Please provide solution to the problem not being able to ping from one subnet to another subnet