You'd have to regroup twice.
Since 26 is bigger than 13, you'd need both the tens and ones places to go up by ten in order to subtract properly.
Substitute the given value of three into the equation so that it becomes
M= 3.5*3+2
M= 12.5
profit on the twenty-five $50 radios
= 25*(50*0.08)=$100
Loss on the six $30 radios
= 6*(30*0.15) = $27
Combined result of both transactions
= $100-27
=$73 (profit)
the answer is A or the one w two right angles