Write algorithm to calculate sum and difference of any two numbers

(step 1 and 2 help clarify the rest of the steps)

first Declare 2 variables →a ,b.

input 2 variables a and b.

print sum=a+b.

print difference = a-b.

print product =a×b.

Step-by-step explanation:

Hope this helps a little :)

BEGIN

DECLARE VARIABLES X, Y

 INPUT VARIABLES X, Y

  READ X, Y

    PRINT SUM = X+Y

    PRINT DIFFERENCE = X-Y

END

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!