My calculations come out to be 9.2 but that is incorrect. Could someone explain the correct process for coming up with 14.4?

Suppose there are 2 routers in sequence between Host A and Host B, all of which use store-and-forward routing. What is the total end-to-end delay for a packet originating from Host A with destination Host B, under the following conditions. Each of the link transmission rates are 7.1 Mbps The total distance from Host A to Host B along its path of transmisison is 144.3 km The speed of propagation through the transmission medium is is 2.5 x 108 m/s The packet size is 4 KiB Remember that you must also uplink from Host A to the first router. Give answer in milliseconds, rounded to 1 decimal place, without units (e.g. for 0.12345 seconds you would enter "123.5" without the quotes). 9.2 14.4 margin of error +/- 0.1