I believe the correct answer is :
the OP has not given enough information to answer the question.
the unknown is does the OP have a WD hitch? and if so, were the spring bars hooked up when the axle was weighed?
If the answer is no WD hitch or no spring bars hooked up, then the actual trailer weight is the sum of the tongue + axles +/- scale resolution for each weight +/- scale accuracy. (likely somewhere between 25 and 100lbs scale resolution)
If the answer is "I had the spring bars hooked up" THEN the unhooked trailer axle weight will be lower than the scale weight because it includes the weight transferred from the TV rear axle. So the real trailer weight is less than the sum of tongue + axle.
the axle LOAD in either case is the weight shonw on the scale, so the axle must be rated for at least that amount.
2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!