In 2017, average petroleum price on the local market for the first 6 months was 3.4 cedis per litre. From July to December 2017, average price was 3.7 cedis per litre. The average domestic price for 2018 was 10% higher than the 2017 average. Exchange rate was 3.67 cedis per dollar in 2017 and 3.91 cedis in 2018.If international oil price was $ 50 in 2017 and $57 in 2018, calculate the pass through price and explain your answer