Concept:Simple interest is calculated using the formula: SI=100P×R×TExplanation:Here, the principal P=GH₵350.00The rate R=5% per annumThe time T=4 yearsSubstitute these values into the formula:SI=100350×5×4Multiply the numerator: 350×5×4=350×20=7000So, SI=1007000=GH₵70.00Answer:C. GH₵ 70.00