To make the equations you must first get the percents and make them into a decimal. then multiply the money by the decimal
EX: $230.76 with a profit of 30%
First make the percent a decimal to do so move the . over to the left two times resulting in the number .30
so the equation is 230.76(.30)
which equals 69.228
now simplify it making the answer $69.23
now to get the store price, add manufacture price with the %30 of the the MP resulting in the answer
$299.99